deleted file mode 100644
--- a/taskcluster/ci/legacy/kind.yml
+++ /dev/null
@@ -1,6 +0,0 @@
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-implementation: 'taskgraph.task.legacy:LegacyTask'
-legacy_path: '.'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/branches/alder/job_flags.yml
+++ /dev/null
@@ -1,14 +0,0 @@
----
-# For complete sample of all build and test jobs,
-# see <gecko>/testing/taskcluster/tasks/branches/base_job_flags.yml
-
-$inherits:
-  from: tasks/branches/base_job_flags.yml
-
-builds:
-  linux64-mulet:
-    platforms:
-      - b2g
-    types:
-      opt:
-        task: tasks/builds/mulet_linux.yml

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/branches/ash/job_flags.yml
+++ /dev/null
@@ -1,30 +0,0 @@
----
-# For complete sample of all build and test jobs,
-# see <gecko>/testing/taskcluster/tasks/branches/base_job_flags.yml
-
-$inherits:
-  from: tasks/branches/base_job_flags.yml
-
-builds:
-  linux64:
-    platforms:
-      - Linux64
-    types:
-      opt:
-        task: tasks/builds/opt_linux64.yml
-      debug:
-        task: tasks/builds/dbg_linux64.yml
-  linux64-asan:
-    platforms:
-      - Linux64 ASan
-    types:
-      opt:
-        task: tasks/builds/opt_linux64_asan.yml
-      debug:
-        task: tasks/builds/dbg_linux64_asan.yml
-  linux64-pgo:
-    platforms:
-      - Linux64 PGO
-    types:
-      opt:
-        task: tasks/builds/opt_linux64_pgo.yml

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/branches/autoland/job_flags.yml
+++ /dev/null
@@ -1,24 +0,0 @@
----
-# For complete sample of all build and test jobs,
-# see <gecko>/testing/taskcluster/tasks/branches/base_job_flags.yml
-
-$inherits:
-  from: tasks/branches/base_jobs.yml
-
-builds:
-  aries-eng:
-    platforms:
-      - b2g
-    types:
-      opt:
-        task: tasks/builds/b2g_aries_eng.yml
-      debug:
-        task: tasks/builds/b2g_aries_debug.yml
-  nexus-5l-eng:
-    platforms:
-      - b2g
-    types:
-      opt:
-        task: tasks/builds/b2g_nexus_5l_eng.yml
-      debug:
-        task: tasks/builds/b2g_nexus_5l_debug.yml

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/branches/base_job_flags.yml
+++ /dev/null
@@ -1,81 +0,0 @@
----
-# List of all possible flags for each category of tests used in the case where
-# "all" is specified.
-flags:
-  builds:
-    - linux32_gecko  # b2g desktop linux 32 bit
-    - linux64_gecko  # b2g desktop linux 64 bit
-    - linux64-mulet  # Firefox desktop - b2g gecko linux 64 bit
-    - linux64-haz    # Firefox desktop browser, rooting hazard analysis
-    - linux64-shell-haz  # JS shell, rooting hazard analysis
-    - linux64-mulet-haz  # Firefox desktop - b2g gecko linux 64 bit, rooting hazard analysis
-    - macosx64_gecko # b2g desktop osx 64 bit
-    - win32_gecko    # b2g desktop win 32 bit
-    - nexus-5l-eng
-    - aries-eng
-    - android-api-15
-    - android-api-15-l10n
-    - android-api-15-gradle
-    - android-api-15-frontend
-    - android-partner-sample1
-    - android-x86
-    - linux
-    - linux-l10n    # Desktop l10n
-    - linux64
-    - linux64-l10n  # Desktop l10n
-    - linux64-st-an
-    - linux64-artifact
-    - linux64-asan
-    - linux64-pgo
-    - linux64-valgrind
-    - macosx64
-    - macosx64-st-an
-    - win32
-    - win64
-
-  tests:
-    - cppunit
-    - crashtest
-    - crashtest-e10s
-    - external-media-tests
-    - firefox-ui-functional-local
-    - firefox-ui-functional-local-e10s
-    - firefox-ui-functional-remote
-    - firefox-ui-functional-remote-e10s
-    - gtest
-    - jittests
-    - jsreftest
-    - jsreftest-e10s
-    - luciddream
-    - marionette
-    - marionette-e10s
-    - marionette-webapi
-    - mochitest
-    - mochitest-a11y
-    - mochitest-browser-chrome
-    - mochitest-browser-chrome-e10s
-    - mochitest-chrome
-    - mochitest-devtools-chrome
-    - mochitest-devtools-chrome-e10s
-    - mochitest-e10s
-    - mochitest-jetpack
-    - mochitest-media
-    - mochitest-media-e10s
-    - mochitest-webgl
-    - mochitest-webgl-e10s
-    - mochitest-gpu
-    - mochitest-gpu-e10s
-    - mochitest-clipboard
-    - mochitest-clipboard-e10s
-    - mochitest-valgrind
-    - mozmill
-    - reftest
-    - reftest-e10s
-    - reftest-no-accel
-    - reftest-no-accel-e10s
-    - robocop
-    - web-platform-tests
-    - web-platform-tests-e10s
-    - web-platform-tests-reftests
-    - web-platform-tests-reftests-e10s
-    - xpcshell

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/branches/base_jobs.yml
+++ /dev/null
@@ -1,396 +0,0 @@
----
-# For complete sample of all build and test jobs,
-# see <gecko>/testing/taskcluster/tasks/branches/base_job_flags.yml
-
-$inherits:
-  from: tasks/branches/base_job_flags.yml
-
-builds:
-  android-api-15:
-    platforms:
-      - Android
-    extra-builds:  # see RIDEALONG_BUILDS in `mach taskgraph`
-      - android-api-15-l10n
-    types:
-      opt:
-        task: tasks/builds/android_api_15.yml
-      debug:
-        task: tasks/builds/android_api_15_debug.yml
-  android-x86:
-    platforms:
-      - Android
-    types:
-      opt:
-        task: tasks/builds/android_x86.yml
-  android-api-15-gradle:
-    platforms:
-      - Android
-    types:
-      opt:
-        task: tasks/builds/android_api_15_gradle.yml
-  linux64-mulet:
-    platforms:
-      - Mulet Linux
-    types:
-      opt:
-        task: tasks/builds/mulet_linux.yml
-      debug:
-        task: tasks/builds/mulet_linux_dbg.yml
-  linux:
-    platforms:
-      - Linux
-    extra-builds:  # see RIDEALONG_BUILDS in `mach taskgraph`
-      - linux-l10n
-    types:
-      opt:
-        task: tasks/builds/opt_linux32.yml
-      debug:
-        task: tasks/builds/dbg_linux32.yml
-  linux64:
-    platforms:
-      - Linux64
-    extra-builds:  # see RIDEALONG_BUILDS in `mach taskgraph`
-      - linux64-l10n
-      - sm-plain
-      - sm-nonunified
-      - sm-arm-sim
-      - sm-arm64-sim
-      - sm-compacting
-      - sm-rootanalysis
-      - sm-package
-      - sm-asan
-      - sm-msan
-    types:
-      opt:
-        task: tasks/builds/opt_linux64.yml
-      debug:
-        task: tasks/builds/dbg_linux64.yml
-  linux64-artifact:
-    platforms:
-      - Linux64
-    types:
-      opt:
-        task: tasks/builds/opt_linux64_artifact.yml
-  linux64-st-an:
-    platforms:
-      - Linux64 Static Analysis
-    types:
-      opt:
-        task: tasks/builds/opt_linux64_st-an.yml
-  linux64-asan:
-    platforms:
-      - Linux64 ASan
-    types:
-      opt:
-        task: tasks/builds/opt_linux64_asan.yml
-      debug:
-        task: tasks/builds/dbg_linux64_asan.yml
-  linux64-haz:
-    platforms:
-      - Linux64
-    types:
-      debug:
-        task: tasks/builds/haz_linux.yml
-  linux64-shell-haz:
-    platforms:
-      - Linux64
-    types:
-      debug:
-        task: tasks/builds/haz_shell_linux.yml
-    when:
-      file_patterns:
-       - js/public/**
-       - js/src/**
-  linux64-pgo:
-    platforms:
-      - Linux64 PGO
-    types:
-      opt:
-        task: tasks/builds/opt_linux64_pgo.yml
-  linux64-valgrind:
-    platforms:
-      - Linux64 Valgrind
-    types:
-      opt:
-        task: tasks/builds/opt_linux64_valgrind.yml
-  macosx64:
-    platforms:
-      - MacOSX64
-    types:
-      opt:
-        task: tasks/builds/opt_macosx64.yml
-      debug:
-        task: tasks/builds/dbg_macosx64.yml
-  macosx64-st-an:
-    platforms:
-      - MacOSX64 Static Analysis
-    types:
-      opt:
-        task: tasks/builds/opt_macosx64_st-an.yml
-  sm-plain:
-    platforms:
-      - Linux64
-    types:
-      opt:
-        task: tasks/builds/sm_plain.yml
-      debug:
-        task: tasks/builds/sm_plaindebug.yml
-    when:
-      file_patterns:
-       - js/public/**
-       - js/src/**
-    when:
-      file_patterns:
-       - js/public/**
-       - js/src/**
-  sm-nonunified:
-    platforms:
-      - Linux64
-    types:
-      debug:
-        task: tasks/builds/sm_nonunified.yml
-    when:
-      file_patterns:
-       - js/public/**
-       - js/src/**
-  sm-arm-sim:
-    platforms:
-      - Linux64
-    types:
-      debug:
-        task: tasks/builds/sm_arm_sim.yml
-    when:
-      file_patterns:
-       - js/public/**
-       - js/src/**
-  sm-arm64-sim:
-    platforms:
-      - Linux64
-    types:
-      debug:
-        task: tasks/builds/sm_arm64_sim.yml
-    when:
-      file_patterns:
-       - js/public/**
-       - js/src/**
-  sm-arm-sim-osx:
-    platforms:
-      - Linux64
-    types:
-      debug:
-        task: tasks/builds/sm_arm_sim_osx.yml
-    when:
-      file_patterns:
-       - js/public/**
-       - js/src/**
-  sm-compacting:
-    platforms:
-      - Linux64
-    types:
-      debug:
-        task: tasks/builds/sm_compacting.yml
-    when:
-      file_patterns:
-       - js/public/**
-       - js/src/**
-  sm-package:
-    platforms:
-      - Linux64
-    types:
-      opt:
-        task: tasks/builds/sm_package.yml
-    when:
-      # Make sure this list stays in sync with the files and directories copied
-      # by `js/src/make-source-package.sh`!
-      file_patterns:
-        - build/**
-        - configure.py
-        - dom/bindings/**
-        - intl/icu/**
-        - js/moz.configure
-        - js/public/**
-        - js/src/**
-        - layout/tools/reftest/reftest/**
-        - media/webrtc/trunk/tools/gyp/**
-        - memory/**
-        - mfbt/**
-        - modules/fdlibm/**
-        - modules/zlib/src/**
-        - mozglue/**
-        - moz.configure
-        - nsprpub/**
-        - python/**
-        - taskcluster/moz.build
-        - testing/mozbase/**
-        - test.mozbuild
-        - toolkit/mozapps/installer/package-name.mk
-        - toolkit/mozapps/installer/upload-files.mk
-  sm-rootanalysis:
-    platforms:
-      - Linux64
-    types:
-      debug:
-        task: tasks/builds/sm_rootanalysis.yml
-    when:
-      file_patterns:
-       - js/public/**
-       - js/src/**
-  sm-asan:
-    platforms:
-      - Linux64
-    types:
-      opt:
-        task: tasks/builds/sm_asan.yml
-    when:
-      file_patterns:
-       - js/public/**
-       - js/src/**
-  sm-msan:
-    platforms:
-      - Linux64
-    types:
-      opt:
-        task: tasks/builds/sm_msan.yml
-    when:
-      file_patterns:
-       - js/public/**
-       - js/src/**
-  win32:
-    platforms:
-      - win32
-    types:
-      opt:
-        task: tasks/builds/opt_win32.yml
-      debug:
-        task: tasks/builds/dbg_win32.yml
-  win64:
-    platforms:
-      - win64
-    types:
-      opt:
-        task: tasks/builds/opt_win64.yml
-      debug:
-        task: tasks/builds/dbg_win64.yml
-
-# Miscellaneous tasks.
-tasks:
-  mozlint-eslint:
-    task: tasks/tests/mozlint-eslint.yml
-    root: true
-    when:
-      file_patterns:
-        # Files that are likely audited.
-        - '**/*.js'
-        - '**/*.jsm'
-        - '**/*.jsx'
-        - '**/*.html'
-        - '**/*.xhtml'
-        - '**/*.xml'
-        # Run when eslint policies change.
-        - '**/.eslintignore'
-        - '**/*eslintrc*'
-        # The plugin implementing custom checks.
-        - 'tools/lint/eslint/eslint-plugin-mozilla/**'
-        # Other misc lint related files.
-        - 'python/mozlint/**'
-        - 'tools/lint/**'
-        - 'testing/docker/lint/**'
-  mozlint-flake8:
-    task: tasks/tests/mozlint-flake8.yml
-    root: true
-    when:
-      file_patterns:
-        - '**/*.py'
-        - '**/.flake8'
-        - 'python/mozlint/**'
-        - 'tools/lint/**'
-        - 'testing/docker/lint/**'
-  wptlint-gecko:
-    task: tasks/tests/mozlint-wpt.yml
-    root: true
-    when:
-      file_patterns:
-        - 'testing/web-platform/tests/**'
-        - 'python/mozlint/**'
-        - 'tools/lint/**'
-        - 'testing/docker/lint/**'
-  sphinx:
-    task: tasks/tests/sphinx.yml
-    root: true
-    when:
-      file_patterns:
-        - '**/*.py'
-        - '**/*.rst'
-        - 'tools/docs/**'
-  taskgraph-tests:
-    task: tasks/tests/taskgraph-tests.yml
-    root: true
-    when:
-      file_patterns:
-        - 'taskcluster/**/*.py'
-        - 'config/mozunit.py'
-        - 'python/mach/**/*.py'
-  android-api-15-gradle-dependencies:
-    task: tasks/builds/android_api_15_gradle_dependencies.yml
-    root: true
-    when:
-      file_patterns:
-        - 'mobile/android/config/**'
-        - 'testing/docker/android-gradle-build/**'
-        - 'testing/mozharness/configs/builds/releng_sub_android_configs/*gradle_dependencies.py'
-        - '**/*.gradle'
-  android-test:
-    task: tasks/builds/android_test.yml
-    root: true
-    when:
-      file_patterns:
-        - 'mobile/android/base/**'
-        - 'mobile/android/tests/background/junit4/**'
-  android-checkstyle:
-    task: tasks/builds/android_checkstyle.yml
-    root: true
-    when:
-      file_patterns:
-        - 'mobile/android/**/checkstyle.xml'
-        - 'mobile/android/**/*.gradle'
-        - 'mobile/android/**/*.java'
-  android-lint:
-    task: tasks/builds/android_lint.yml
-    root: true
-    when:
-      file_patterns:
-        - 'mobile/android/**/*.java'
-        - 'mobile/android/**/*.jpeg'
-        - 'mobile/android/**/*.jpg'
-        - 'mobile/android/**/*.png'
-        - 'mobile/android/**/*.svg'
-        - 'mobile/android/**/*.xml' # Manifest & android resources
-        - 'mobile/android/**/build.gradle'
-  mozharness:
-    task: tasks/tests/mozharness-gecko.yml
-    root: true
-    when:
-      file_patterns:
-        - 'testing/mozharness/**'
-  marionette-harness:
-    task: tasks/tests/harness_marionette.yml
-    root: true
-    when:
-        file_patterns:
-          - 'testing/marionette/harness/**'
-          - 'testing/mozharness/scripts/marionette_harness_tests.py'
-          - 'testing/config/marionette_harness_test_requirements.txt'
-  linux64-gcc:
-    task: tasks/builds/linux64_gcc.yml
-    root: true
-    when:
-        file_patterns:
-          - 'build/unix/build-gcc/**'
-          - 'taskcluster/scripts/misc/build-gcc-linux.sh'
-  linux64-clang:
-    task: tasks/builds/linux64_clang.yml
-    root: true
-    when:
-        file_patterns:
-          - 'build/build-clang/**'
-          - 'taskcluster/scripts/misc/build-clang-linux.sh'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/branches/mozilla-central/job_flags.yml
+++ /dev/null
@@ -1,24 +0,0 @@
----
-# For complete sample of all build and test jobs,
-# see <gecko>/testing/taskcluster/tasks/branches/base_job_flags.yml
-
-$inherits:
-  from: tasks/branches/base_jobs.yml
-
-builds:
-  aries-eng:
-    platforms:
-      - b2g
-    types:
-      opt:
-        task: tasks/builds/b2g_aries_eng.yml
-      debug:
-        task: tasks/builds/b2g_aries_debug.yml
-  nexus-5l-eng:
-    platforms:
-      - b2g
-    types:
-      opt:
-        task: tasks/builds/b2g_nexus_5l_eng.yml
-      debug:
-        task: tasks/builds/b2g_nexus_5l_debug.yml

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/branches/mozilla-inbound/job_flags.yml
+++ /dev/null
@@ -1,24 +0,0 @@
----
-# For complete sample of all build and test jobs,
-# see <gecko>/testing/taskcluster/tasks/branches/base_job_flags.yml
-
-$inherits:
-  from: tasks/branches/base_jobs.yml
-
-builds:
-  aries-eng:
-    platforms:
-      - b2g
-    types:
-      opt:
-        task: tasks/builds/b2g_aries_eng.yml
-      debug:
-        task: tasks/builds/b2g_aries_debug.yml
-  nexus-5l-eng:
-    platforms:
-      - b2g
-    types:
-      opt:
-        task: tasks/builds/b2g_nexus_5l_eng.yml
-      debug:
-        task: tasks/builds/b2g_nexus_5l_debug.yml

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/branches/stylo-try/job_flags.yml
+++ /dev/null
@@ -1,104 +0,0 @@
----
-# For complete sample of all build and test jobs,
-# see <gecko>/testing/taskcluster/tasks/branches/base_job_flags.yml
-
-$inherits:
-  from: tasks/branches/base_jobs.yml
-
-flags:
-  post-build:
-    - upload-symbols
-
-builds:
-  linux:
-    platforms:
-      - Linux
-    types:
-      opt:
-        task: tasks/builds/opt_linux32.yml
-      debug:
-        task: tasks/builds/dbg_linux32.yml
-  linux64:
-    platforms:
-      - Linux64
-    extra-builds:  # see RIDEALONG_BUILDS in `mach taskgraph`
-      - linux64-l10n
-      - sm-plain
-      - sm-nonunified
-      - sm-arm-sim
-      - sm-arm64-sim
-      - sm-compacting
-      - sm-rootanalysis
-      - sm-package
-      - sm-tsan
-    types:
-      opt:
-        task: tasks/builds/opt_linux64.yml
-      debug:
-        task: tasks/builds/dbg_linux64.yml
-  linux64-st-an:
-    platforms:
-      - Linux64 Static Analysis
-    types:
-      opt:
-        task: tasks/builds/opt_linux64_st-an.yml
-  linux64-pgo:
-    platforms:
-      - Linux64 PGO
-    types:
-      opt:
-        task: tasks/builds/opt_linux64_pgo.yml
-  linux64-mulet:
-    platforms:
-      - Mulet Linux
-    types:
-      opt:
-        task: tasks/builds/mulet_linux.yml
-      debug:
-        task: tasks/builds/mulet_linux_dbg.yml
-  linux64-mulet-haz:
-    platforms:
-      - Mulet Linux
-    types:
-      debug:
-        task: tasks/builds/mulet_haz_linux.yml
-  macosx64:
-    platforms:
-      - MacOSX64
-    types:
-      opt:
-        task: tasks/builds/opt_macosx64.yml
-      debug:
-        task: tasks/builds/dbg_macosx64.yml
-  linux64-asan:
-    platforms:
-      - Linux64 ASan
-    types:
-      opt:
-        task: tasks/builds/opt_linux64_asan.yml
-      debug:
-        task: tasks/builds/dbg_linux64_asan.yml
-  macosx64-st-an:
-    platforms:
-      - MacOSX64 Static Analysis
-    types:
-      opt:
-        task: tasks/builds/opt_macosx64_st-an.yml
-  sm-tsan:
-    platforms:
-      - Linux64
-    types:
-      opt:
-        task: tasks/builds/sm_tsan.yml
-    when:
-      file_patterns:
-       - js/public/**
-       - js/src/**
-
-post-build:
-  upload-symbols:
-    allowed_build_tasks:
-      - tasks/builds/opt_linux64.yml
-      - tasks/builds/dbg_linux64.yml
-      - tasks/builds/android_api_15.yml
-    task: tasks/post-builds/upload_symbols.yml

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/branches/stylo/job_flags.yml
+++ /dev/null
@@ -1,6 +0,0 @@
----
-# For complete sample of all build and test jobs,
-# see <gecko>/testing/taskcluster/tasks/branches/base_job_flags.yml
-
-$inherits:
-  from: tasks/branches/base_jobs.yml

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/branches/try/job_flags.yml
+++ /dev/null
@@ -1,172 +0,0 @@
----
-# For complete sample of all build and test jobs,
-# see <gecko>/testing/taskcluster/tasks/branches/base_job_flags.yml
-
-$inherits:
-  from: tasks/branches/base_jobs.yml
-
-# Flags specific to this branch
-flags:
-  post-build:
-    - upload-symbols
-
-builds:
-  android-partner-sample1:
-    platforms:
-      - Android
-    types:
-      opt:
-        task: tasks/builds/android_api_15_partner_sample1.yml
-  linux:
-    platforms:
-      - Linux
-    types:
-      opt:
-        task: tasks/builds/opt_linux32.yml
-      debug:
-        task: tasks/builds/dbg_linux32.yml
-  linux-l10n:
-    platforms:
-      - Linux
-    types:
-      opt:
-        task: tasks/builds/firefox_l10n_linux32.yml
-    when:
-      file_patterns:
-        - browser/locales/all-locales
-        - python/compare-locales/**
-        - testing/mozharness/configs/single_locale/**
-        - testing/mozharness/mozharness/mozilla/l10n/locales.py
-        - testing/mozharness/scripts/desktop_l10n.py
-        - toolkit/locales/**
-        - toolkit/mozapps/installer/**
-  linux64:
-    platforms:
-      - Linux64
-    extra-builds:  # see RIDEALONG_BUILDS in `mach taskgraph`
-      - linux64-l10n
-      - sm-plain
-      - sm-nonunified
-      - sm-arm-sim
-      - sm-arm64-sim
-      - sm-compacting
-      - sm-rootanalysis
-      - sm-package
-      - sm-tsan
-    types:
-      opt:
-        task: tasks/builds/opt_linux64.yml
-      debug:
-        task: tasks/builds/dbg_linux64.yml
-  linux64-l10n:
-    platforms:
-      - Linux64
-    types:
-      opt:
-        task: tasks/builds/firefox_l10n_linux64.yml
-    when:
-      file_patterns:
-        - browser/locales/all-locales
-        - python/compare-locales/**
-        - testing/mozharness/configs/single_locale/**
-        - testing/mozharness/mozharness/mozilla/l10n/locales.py
-        - testing/mozharness/scripts/desktop_l10n.py
-        - toolkit/locales/**
-        - toolkit/mozapps/installer/**
-  linux64-st-an:
-    platforms:
-      - Linux64 Static Analysis
-    types:
-      opt:
-        task: tasks/builds/opt_linux64_st-an.yml
-  linux64-pgo:
-    platforms:
-      - Linux64 PGO
-    types:
-      opt:
-        task: tasks/builds/opt_linux64_pgo.yml
-  linux64-mulet:
-    platforms:
-      - Mulet Linux
-    types:
-      opt:
-        task: tasks/builds/mulet_linux.yml
-      debug:
-        task: tasks/builds/mulet_linux_dbg.yml
-  linux64-mulet-haz:
-    platforms:
-      - Mulet Linux
-    types:
-      debug:
-        task: tasks/builds/mulet_haz_linux.yml
-  macosx64:
-    platforms:
-      - MacOSX64
-    types:
-      opt:
-        task: tasks/builds/opt_macosx64.yml
-      debug:
-        task: tasks/builds/dbg_macosx64.yml
-  linux64-asan:
-    platforms:
-      - Linux64 ASan
-    types:
-      opt:
-        task: tasks/builds/opt_linux64_asan.yml
-      debug:
-        task: tasks/builds/dbg_linux64_asan.yml
-  macosx64-st-an:
-    platforms:
-      - MacOSX64 Static Analysis
-    types:
-      opt:
-        task: tasks/builds/opt_macosx64_st-an.yml
-  android-api-15-l10n:
-    platforms:
-      - Android
-    types:
-      opt:
-        task: tasks/builds/android_l10n_api_15.yml
-    when:
-      file_patterns:
-        - mobile/android/locales/all-locales
-        - python/compare-locales/**
-        - testing/mozharness/configs/single_locale/**
-        - testing/mozharness/mozharness/mozilla/l10n/locales.py
-        - testing/mozharness/scripts/desktop_l10n.py
-        - toolkit/locales/**
-        - toolkit/mozapps/installer/**
-  aries-eng:
-    platforms:
-      - b2g
-    types:
-      opt:
-        task: tasks/builds/b2g_aries_eng.yml
-      debug:
-        task: tasks/builds/b2g_aries_debug.yml
-  nexus-5l-eng:
-    platforms:
-      - b2g
-    types:
-      opt:
-        task: tasks/builds/b2g_nexus_5l_eng.yml
-      debug:
-        task: tasks/builds/b2g_nexus_5l_debug.yml
-  sm-tsan:
-    platforms:
-      - Linux64
-    types:
-      opt:
-        task: tasks/builds/sm_tsan.yml
-    when:
-      file_patterns:
-       - js/public/**
-       - js/src/**
-
-post-build:
-  upload-symbols:
-    allowed_build_tasks:
-      - tasks/builds/opt_linux64.yml
-      - tasks/builds/dbg_linux64.yml
-      - tasks/builds/android_api_15.yml
-    task: tasks/post-builds/upload_symbols.yml

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/build.yml
+++ /dev/null
@@ -1,46 +0,0 @@
-# This is the "base" task which contains the common values all builds must
-# provide.
----
-taskId: {{build_slugid}}
-
-task:
-  created:
-    relative-datestamp: "0 seconds"
-  deadline:
-    relative-datestamp: "24 hours"
-  metadata:
-    source: '{{source}}'
-    owner: mozilla-taskcluster-maintenance@mozilla.com
-
-  tags:
-    createdForUser: {{owner}}
-
-  provisionerId: aws-provisioner-v1
-  schedulerId: task-graph-scheduler
-
-  payload:
-    # Two hours is long but covers edge cases (and matches bb based infra)
-    maxRunTime: 7200
-
-    env:
-      # Common environment variables for checking out gecko
-      GECKO_BASE_REPOSITORY: '{{base_repository}}'
-      GECKO_HEAD_REPOSITORY: '{{head_repository}}'
-      GECKO_HEAD_REV: '{{head_rev}}'
-      GECKO_HEAD_REF: '{{head_ref}}'
-      TOOLTOOL_REPO: 'https://github.com/mozilla/build-tooltool'
-      TOOLTOOL_REV: 'master'
-      MOZ_BUILD_DATE: '{{pushdate}}'
-      MOZ_SCM_LEVEL: '{{level}}'
-
-  extra:
-    build_product: '{{build_product}}'
-    build_name: '{{build_name}}'
-    build_type: '{{build_type}}'
-    index:
-      rank: {{rank}}
-    treeherder:
-      jobKind: build
-      groupSymbol: tc
-      groupName: Submitted by taskcluster
-      symbol: B

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/android_api_15.yml
+++ /dev/null
@@ -1,65 +0,0 @@
-$inherits:
-  from: 'tasks/builds/mobile_base.yml'
-  variables:
-    build_name: 'android-api-15'
-    build_type: 'opt'
-task:
-  metadata:
-      name: '[TC] Android armv7 API 15+'
-      description: 'Android armv7 API 15+'
-
-  workerType: android-api-15
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.android-api-15'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.android-api-15'
-
-  scopes:
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-android-api-15-opt-workspace'
-    - 'docker-worker:cache:tooltool-cache'
-    - 'docker-worker:relengapi-proxy:tooltool.download.internal'
-    - 'docker-worker:relengapi-proxy:tooltool.download.public'
-
-  payload:
-    cache:
-      level-{{level}}-{{project}}-build-android-api-15-opt-workspace: '/home/worker/workspace'
-      tooltool-cache: '/home/worker/tooltool-cache'
-
-    features:
-      relengAPIProxy: true
-
-    env:
-      # inputs to mozharness
-      MOZHARNESS_SCRIPT: 'mozharness/scripts/fx_desktop_build.py'
-      # TODO: make these additional configuration files go away
-      MOZHARNESS_CONFIG: >
-          builds/releng_base_android_64_builds.py
-          disable_signing.py
-          platform_supports_post_upload_to_latest.py
-      MOZHARNESS_ACTIONS: "get-secrets build multi-l10n update"
-      MH_CUSTOM_BUILD_VARIANT_CFG: api-15
-      MH_BRANCH: {{project}}
-      MH_BUILD_POOL: taskcluster
-      TOOLTOOL_CACHE: '/home/worker/tooltool-cache'
-
-    command: ["/bin/bash", "bin/build.sh"]
-
-  extra:
-    treeherderEnv:
-      - production
-      - staging
-    treeherder:
-      machine:
-        # see https://github.com/mozilla/treeherder/blob/master/ui/js/values.js
-        platform: android-4-0-armv7-api15
-      groupSymbol: tc
-      groupName: Submitted by taskcluster
-      symbol: B
-      tier: 2
-    # Rather then enforcing particular conventions we require that all build
-    # tasks provide the "build" extra field to specify where the build and tests
-    # files are located.
-    locations:
-      build: 'public/build/target.apk'
-      mozharness: 'public/build/mozharness.zip'
-      test_packages: 'public/build/target.test_packages.json'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/android_api_15_debug.yml
+++ /dev/null
@@ -1,67 +0,0 @@
-$inherits:
-  from: 'tasks/builds/mobile_base.yml'
-  variables:
-    build_name: 'android-api-15'
-    build_type: 'debug'
-task:
-  metadata:
-      name: '[TC] Android armv7 API 15+ Dbg'
-      description: 'Android armv7 API 15+ Dbg'
-
-  workerType: android-api-15
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.android-api-15-debug'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.android-api-15-debug'
-
-  scopes:
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-android-api-15-debug-workspace'
-    - 'docker-worker:cache:tooltool-cache'
-    - 'docker-worker:relengapi-proxy:tooltool.download.internal'
-    - 'docker-worker:relengapi-proxy:tooltool.download.public'
-
-  payload:
-    cache:
-      level-{{level}}-{{project}}-build-android-api-15-debug-workspace: '/home/worker/workspace'
-      tooltool-cache: '/home/worker/tooltool-cache'
-
-    features:
-      relengAPIProxy: true
-
-    env:
-      # inputs to mozharness
-      MOZHARNESS_SCRIPT: 'mozharness/scripts/fx_desktop_build.py'
-      # TODO: make these additional configuration files go away
-      MOZHARNESS_CONFIG: >
-          builds/releng_base_android_64_builds.py
-          disable_signing.py
-          platform_supports_post_upload_to_latest.py
-      MOZHARNESS_ACTIONS: "get-secrets build multi-l10n update"
-      MH_CUSTOM_BUILD_VARIANT_CFG: api-15-debug
-      MH_BRANCH: {{project}}
-      MH_BUILD_POOL: taskcluster
-      TOOLTOOL_CACHE: '/home/worker/tooltool-cache'
-
-    command: ["/bin/bash", "bin/build.sh"]
-
-  extra:
-    treeherderEnv:
-      - production
-      - staging
-    treeherder:
-      machine:
-        # see https://github.com/mozilla/treeherder/blob/master/ui/js/values.js
-        platform: android-4-0-armv7-api15
-      groupSymbol: tc
-      groupName: Submitted by taskcluster
-      symbol: B
-      tier: 1
-      collection:
-        debug: true
-    # Rather then enforcing particular conventions we require that all build
-    # tasks provide the "build" extra field to specify where the build and tests
-    # files are located.
-    locations:
-      build: 'public/build/target.apk'
-      mozharness: 'public/build/mozharness.zip'
-      test_packages: 'public/build/target.test_packages.json'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/android_api_15_gradle.yml
+++ /dev/null
@@ -1,66 +0,0 @@
-$inherits:
-  from: 'tasks/builds/mobile_base.yml'
-  variables:
-    build_name: 'android-api-15-gradle'
-    build_type: 'opt'
-task:
-  metadata:
-      name: '[TC] Android armv7 API 15+ Gradle'
-      description: 'Android armv7 API 15+ Gradle'
-
-  workerType: android-api-15
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.android-api-15-gradle'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.android-api-15-gradle'
-
-  scopes:
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-android-api-15-gradle-opt-workspace'
-    - 'docker-worker:cache:tooltool-cache'
-    - 'docker-worker:relengapi-proxy:tooltool.download.internal'
-    - 'docker-worker:relengapi-proxy:tooltool.download.public'
-
-  payload:
-    cache:
-      level-{{level}}-{{project}}-build-android-api-15-gradle-opt-workspace: '/home/worker/workspace'
-      tooltool-cache: '/home/worker/tooltool-cache'
-
-    features:
-      relengAPIProxy: true
-
-    env:
-      # inputs to mozharness
-      MOZHARNESS_SCRIPT: 'mozharness/scripts/fx_desktop_build.py'
-      # TODO: make these additional configuration files go away
-      MOZHARNESS_CONFIG: >
-          builds/releng_base_android_64_builds.py
-          disable_signing.py
-          platform_supports_post_upload_to_latest.py
-      MOZHARNESS_ACTIONS: "get-secrets build multi-l10n update"
-      TOOLTOOL_CACHE: /home/worker/tooltool-cache
-      MH_CUSTOM_BUILD_VARIANT_CFG: api-15-gradle
-      MH_BRANCH: {{project}}
-      MH_BUILD_POOL: taskcluster
-      GRADLE_USER_HOME: '/home/worker/workspace/build/src/dotgradle'
-
-    command: ["/bin/bash", "bin/build.sh"]
-
-  extra:
-    treeherderEnv:
-      - production
-      - staging
-    treeherder:
-      machine:
-        # see https://github.com/mozilla/treeherder/blob/master/ui/js/values.js
-        platform: android-4-0-armv7-api15
-      groupSymbol: tc
-      groupName: Submitted by taskcluster
-      symbol: Bg
-      tier: 2
-    # Rather then enforcing particular conventions we require that all build
-    # tasks provide the "build" extra field to specify where the build and tests
-    # files are located.
-    locations:
-      build: 'public/build/target.apk'
-      mozharness: 'public/build/mozharness.zip'
-      test_packages: 'public/build/target.test_packages.json'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/android_api_15_gradle_dependencies.yml
+++ /dev/null
@@ -1,84 +0,0 @@
-# A build-like task to fetch Android Gradle dependencies from jcentral and
-# package them for consumption by tooltool users.  Normally invoked manually.
-
-$inherits:
-  from: 'tasks/builds/mobile_base.yml'
-  variables:
-    build_name: 'android-api-15-gradle-dependencies'
-    build_type: 'opt'
-docker-image: android-gradle-build
-task:
-  metadata:
-      name: '[TC] Android armv7 API 15+ gradle dependencies'
-      description: 'Android armv7 API 15+ gradle dependencies'
-
-  workerType: android-api-15
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.android-api-15-gradle-dependencies'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.android-api-15-gradle-dependencies'
-
-  scopes:
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-android-api-15-gradle-dependencies-workspace'
-    - 'docker-worker:cache:tooltool-cache'
-    - 'docker-worker:relengapi-proxy:tooltool.download.internal'
-    - 'docker-worker:relengapi-proxy:tooltool.download.public'
-
-  payload:
-    cache:
-      level-{{level}}-{{project}}-build-android-api-15-gradle-dependencies-workspace: '/home/worker/workspace'
-      tooltool-cache: '/home/worker/tooltool-cache'
-
-    features:
-      relengAPIProxy: true
-
-    env:
-      # inputs to mozharness
-      MOZHARNESS_SCRIPT: 'mozharness/scripts/fx_desktop_build.py'
-      # TODO: make these additional configuration files go away
-      MOZHARNESS_CONFIG: >
-          builds/releng_base_android_64_builds.py
-          disable_signing.py
-          platform_supports_post_upload_to_latest.py
-      MOZHARNESS_ACTIONS: "get-secrets build multi-l10n update"
-      MH_CUSTOM_BUILD_VARIANT_CFG: api-15-gradle-dependencies
-      MH_BRANCH: {{project}}
-      MH_BUILD_POOL: taskcluster
-      GRADLE_USER_HOME: '/home/worker/workspace/build/src/dotgradle-online'
-      TOOLTOOL_CACHE: '/home/worker/tooltool-cache'
-
-    maxRunTime: 36000
-
-    image:
-      type: 'task-image'
-      path: 'public/image.tar'
-      taskId:
-        task-reference: "<docker-image>"
-
-    command:
-      - /bin/bash
-      - -c
-      - >
-        /home/worker/bin/before.sh &&
-        /home/worker/bin/build.sh &&
-        /home/worker/bin/after.sh &&
-        true
-
-  extra:
-    treeherderEnv:
-      - production
-      - staging
-    treeherder:
-      machine:
-        # see https://github.com/mozilla/treeherder/blob/master/ui/js/values.js
-        platform: android-4-0-armv7-api15
-      groupSymbol: tc
-      groupName: Submitted by taskcluster
-      symbol: Deps
-      tier: 2
-    # Rather then enforcing particular conventions we require that all build
-    # tasks provide the "build" extra field to specify where the build and tests
-    # files are located.
-    locations:
-      build: 'public/build/target.linux-x86_64.tar.bz2'
-      tests: 'public/build/target.tests.zip'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/android_api_15_partner_sample1.yml
+++ /dev/null
@@ -1,74 +0,0 @@
-$inherits:
-  from: 'tasks/builds/mobile_base.yml'
-  variables:
-    build_name: 'android-api-15-partner-sample1'
-    build_type: 'opt'
-task:
-  metadata:
-      name: '[TC] Android armv7 API 15+ partner sample 1'
-      description: 'Android armv7 API 15+ partner sample 1'
-
-  workerType: android-api-15
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.android-api-15-partner-sample1'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.android-api-15-partner-sample1'
-
-  scopes:
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-android-api-15-workspace'
-    - 'docker-worker:cache:tooltool-cache'
-    - 'docker-worker:relengapi-proxy:tooltool.download.internal'
-    - 'docker-worker:relengapi-proxy:tooltool.download.public'
-
-  payload:
-    cache:
-      level-{{level}}-{{project}}-build-android-api-15-workspace: '/home/worker/workspace'
-      tooltool-cache: '/home/worker/tooltool-cache'
-
-    features:
-      relengAPIProxy: true
-
-    env:
-      # inputs to mozharness
-      MOZHARNESS_SCRIPT: 'mozharness/scripts/fx_desktop_build.py'
-      # TODO: make these additional configuration files go away
-      MOZHARNESS_CONFIG: >
-          builds/releng_base_android_64_builds.py
-          disable_signing.py
-          platform_supports_post_upload_to_latest.py
-      MOZHARNESS_ACTIONS: 'get-secrets build multi-l10n update'
-      MH_CUSTOM_BUILD_VARIANT_CFG: api-15-partner-sample1
-      MH_BRANCH: {{project}}
-      MH_BUILD_POOL: taskcluster
-      TOOLTOOL_CACHE: '/home/worker/tooltool-cache'
-
-      # space separated list of repositories required for this build
-      # for each ITEM in list you want checked out, you must also supply tc-vcs args:
-      # e.g. ${ITEM}_BASE_REPOSITORY
-      EXTRA_CHECKOUT_REPOSITORIES: >
-          PARTNER
-
-      PARTNER_BASE_REPOSITORY: 'https://github.com/mozilla/fennec-distribution-sample'
-      PARTNER_HEAD_REPOSITORY: 'https://github.com/mozilla/fennec-distribution-sample'
-      PARTNER_HEAD_REV: master
-      PARTNER_DEST_DIR: '/home/worker/workspace/build/partner'
-
-    maxRunTime: 36000
-
-    command: ["/bin/bash", "bin/build.sh"]
-
-  extra:
-    treeherderEnv:
-      - production
-      - staging
-    treeherder:
-      tier: 2
-      machine:
-        # see https://github.com/mozilla/treeherder/blob/master/ui/js/values.js
-        platform: android-4-0-armv7-api15-partner1
-    # Rather then enforcing particular conventions we require that all build
-    # tasks provide the "build" extra field to specify where the build and tests
-    # files are located.
-    locations:
-      build: 'public/build/target.linux-x86_64.tar.bz2'
-      tests: 'public/build/target.tests.zip'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/android_checkstyle.yml
+++ /dev/null
@@ -1,73 +0,0 @@
-$inherits:
-  from: 'tasks/builds/mobile_base.yml'
-  variables:
-    build_name: 'android-checkstyle'
-    build_type: 'opt'
-task:
-  metadata:
-      name: '[TC] Android checkstyle'
-      description: 'Android checkstyle'
-
-  workerType: android-api-15
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.android-checkstyle'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.android-checkstyle'
-
-  scopes:
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-android-checkstyle-workspace'
-    - 'docker-worker:cache:tooltool-cache'
-    - 'docker-worker:relengapi-proxy:tooltool.download.internal'
-    - 'docker-worker:relengapi-proxy:tooltool.download.public'
-
-  payload:
-    cache:
-      level-{{level}}-{{project}}-build-android-checkstyle-workspace: '/home/worker/workspace'
-      tooltool-cache: '/home/worker/tooltool-cache'
-
-    features:
-      relengAPIProxy: true
-
-    env:
-      # inputs to mozharness
-      MOZHARNESS_SCRIPT: 'mozharness/scripts/fx_desktop_build.py'
-      # TODO: make these additional configuration files go away
-      MOZHARNESS_CONFIG: >
-          builds/releng_base_android_64_builds.py
-          disable_signing.py
-          platform_supports_post_upload_to_latest.py
-      MOZHARNESS_ACTIONS: "get-secrets build multi-l10n update"
-      MH_CUSTOM_BUILD_VARIANT_CFG: android-checkstyle
-      MH_BRANCH: {{project}}
-      MH_BUILD_POOL: taskcluster
-      GRADLE_USER_HOME: '/home/worker/workspace/build/src/dotgradle'
-
-    maxRunTime: 36000
-
-    command: ["/bin/bash", "bin/build.sh"]
-
-    artifacts:
-      'public/android/checkstyle/checkstyle.xml':
-        type: file
-        path: '/home/worker/workspace/build/src/obj-firefox/gradle/build/mobile/android/app/reports/checkstyle/checkstyle.xml'
-        expires:
-          relative-datestamp: "1 year"
-
-  extra:
-    treeherderEnv:
-      - production
-      - staging
-    treeherder:
-      machine:
-        # see https://github.com/mozilla/treeherder/blob/master/ui/js/values.js
-        platform: android-4-0-armv7-api15
-      groupSymbol: tc
-      groupName: Submitted by taskcluster
-      symbol: checkstyle
-      tier: 2
-    # Rather then enforcing particular conventions we require that all build
-    # tasks provide the "build" extra field to specify where the build and tests
-    # files are located.
-    locations:
-      build: 'public/build/target.linux-x86_64.tar.bz2'
-      tests: 'public/build/target.tests.zip'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/android_lint.yml
+++ /dev/null
@@ -1,83 +0,0 @@
-$inherits:
-  from: 'tasks/builds/mobile_base.yml'
-  variables:
-    build_name: 'android-lint'
-    build_type: 'opt'
-task:
-  metadata:
-      name: '[TC] Android lint'
-      description: 'Android lint'
-
-  workerType: android-api-15
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.android-lint'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.android-lint'
-
-  scopes:
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-android-lint-workspace'
-    - 'docker-worker:cache:tooltool-cache'
-    - 'docker-worker:relengapi-proxy:tooltool.download.internal'
-    - 'docker-worker:relengapi-proxy:tooltool.download.public'
-
-  payload:
-    cache:
-      level-{{level}}-{{project}}-build-android-lint-workspace: '/home/worker/workspace'
-      tooltool-cache: '/home/worker/tooltool-cache'
-
-    features:
-      relengAPIProxy: true
-
-    env:
-      # inputs to mozharness
-      MOZHARNESS_SCRIPT: 'mozharness/scripts/fx_desktop_build.py'
-      # TODO: make these additional configuration files go away
-      MOZHARNESS_CONFIG: >
-          builds/releng_base_android_64_builds.py
-          disable_signing.py
-          platform_supports_post_upload_to_latest.py
-      MOZHARNESS_ACTIONS: "get-secrets build multi-l10n update"
-      MH_CUSTOM_BUILD_VARIANT_CFG: android-lint
-      MH_BRANCH: {{project}}
-      MH_BUILD_POOL: taskcluster
-      GRADLE_USER_HOME: '/home/worker/workspace/build/src/dotgradle'
-
-    maxRunTime: 36000
-
-    command: ["/bin/bash", "bin/build.sh"]
-
-    artifacts:
-      'public/android/lint/lint-results-automationDebug.html':
-        type: file
-        path: '/home/worker/workspace/build/src/obj-firefox/gradle/build/mobile/android/app/outputs/lint-results-automationDebug.html'
-        expires:
-          relative-datestamp: "1 year"
-      'public/android/lint/lint-results-automationDebug.xml':
-        type: file
-        path: '/home/worker/workspace/build/src/obj-firefox/gradle/build/mobile/android/app/outputs/lint-results-automationDebug.xml'
-        expires:
-          relative-datestamp: "1 year"
-      'public/android/lint/lint-results-automationDebug_files':
-        type: directory
-        path: '/home/worker/workspace/build/src/obj-firefox/gradle/build/mobile/android/app/outputs/lint-results-automationDebug_files'
-        expires:
-          relative-datestamp: "1 year"
-
-  extra:
-    treeherderEnv:
-      - production
-      - staging
-    treeherder:
-      machine:
-        # see https://github.com/mozilla/treeherder/blob/master/ui/js/values.js
-        platform: android-4-0-armv7-api15
-      groupSymbol: tc
-      groupName: Submitted by taskcluster
-      symbol: lint
-      tier: 2
-    # Rather then enforcing particular conventions we require that all build
-    # tasks provide the "build" extra field to specify where the build and tests
-    # files are located.
-    locations:
-      build: 'public/build/target.linux-x86_64.tar.bz2'
-      tests: 'public/build/target.tests.zip'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/android_test.yml
+++ /dev/null
@@ -1,73 +0,0 @@
-$inherits:
-  from: 'tasks/builds/mobile_base.yml'
-  variables:
-    build_name: 'android-test'
-    build_type: 'opt'
-task:
-  metadata:
-      name: '[TC] Android armv7 test'
-      description: 'Android armv7 unit tests'
-
-  workerType: android-api-15
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.android-test'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.android-test'
-
-  scopes:
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-android-test-workspace'
-    - 'docker-worker:cache:tooltool-cache'
-    - 'docker-worker:relengapi-proxy:tooltool.download.internal'
-    - 'docker-worker:relengapi-proxy:tooltool.download.public'
-
-  payload:
-    cache:
-      level-{{level}}-{{project}}-build-android-test-workspace: '/home/worker/workspace'
-      tooltool-cache: '/home/worker/tooltool-cache'
-
-    features:
-      relengAPIProxy: true
-
-    env:
-      # inputs to mozharness
-      MOZHARNESS_SCRIPT: 'mozharness/scripts/fx_desktop_build.py'
-      # TODO: make these additional configuration files go away
-      MOZHARNESS_CONFIG: >
-          builds/releng_base_android_64_builds.py
-          disable_signing.py
-          platform_supports_post_upload_to_latest.py
-      MOZHARNESS_ACTIONS: "get-secrets build multi-l10n update"
-      MH_CUSTOM_BUILD_VARIANT_CFG: android-test
-      MH_BRANCH: {{project}}
-      MH_BUILD_POOL: taskcluster
-      GRADLE_USER_HOME: '/home/worker/workspace/build/src/dotgradle'
-
-    maxRunTime: 36000
-
-    command: ["/bin/bash", "bin/build.sh"]
-
-    artifacts:
-      'public/android/unittest':
-        type: directory
-        path: '/home/worker/workspace/build/src/obj-firefox/gradle/build/mobile/android/app/reports/tests'
-        expires:
-          relative-datestamp: "1 year"
-
-  extra:
-    treeherderEnv:
-      - production
-      - staging
-    treeherder:
-      machine:
-        # see https://github.com/mozilla/treeherder/blob/master/ui/js/values.js
-        platform: android-4-0-armv7-api15
-      groupSymbol: tc
-      groupName: Submitted by taskcluster
-      symbol: test
-      tier: 2
-    # Rather then enforcing particular conventions we require that all build
-    # tasks provide the "build" extra field to specify where the build and tests
-    # files are located.
-    locations:
-      build: 'public/build/target.linux-x86_64.tar.bz2'
-      tests: 'public/build/target.tests.zip'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/android_x86.yml
+++ /dev/null
@@ -1,65 +0,0 @@
-$inherits:
-  from: 'tasks/builds/mobile_base.yml'
-  variables:
-    build_name: 'android-x86'
-    build_type: 'opt'
-task:
-  metadata:
-      name: '[TC] Android x86'
-      description: 'Android x86'
-
-  workerType: android-api-15
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.android-x86'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.android-x86'
-
-  scopes:
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-android-x86-opt-workspace'
-    - 'docker-worker:cache:tooltool-cache'
-    - 'docker-worker:relengapi-proxy:tooltool.download.internal'
-    - 'docker-worker:relengapi-proxy:tooltool.download.public'
-
-  payload:
-    cache:
-      level-{{level}}-{{project}}-build-android-x86-opt-workspace: '/home/worker/workspace'
-      tooltool-cache: '/home/worker/tooltool-cache'
-
-    features:
-      relengAPIProxy: true
-
-    env:
-      # inputs to mozharness
-      MOZHARNESS_SCRIPT: 'mozharness/scripts/fx_desktop_build.py'
-      # TODO: make these additional configuration files go away
-      MOZHARNESS_CONFIG: >
-          builds/releng_base_android_64_builds.py
-          disable_signing.py
-          platform_supports_post_upload_to_latest.py
-      MOZHARNESS_ACTIONS: "get-secrets build multi-l10n update"
-      MH_CUSTOM_BUILD_VARIANT_CFG: x86
-      MH_BRANCH: {{project}}
-      MH_BUILD_POOL: taskcluster
-      TOOLTOOL_CACHE: /home/worker/tooltool-cache
-
-    command: ["/bin/bash", "bin/build.sh"]
-
-  extra:
-    treeherderEnv:
-      - production
-      - staging
-    treeherder:
-      machine:
-        # see https://github.com/mozilla/treeherder/blob/master/ui/js/values.js
-        platform: android-4-2-x86
-      groupSymbol: tc
-      groupName: Submitted by taskcluster
-      symbol: B
-      tier: 1
-    # Rather then enforcing particular conventions we require that all build
-    # tasks provide the "build" extra field to specify where the build and tests
-    # files are located.
-    locations:
-      build: 'public/build/target.apk'
-      mozharness: 'public/build/mozharness.zip'
-      test_packages: 'public/build/target.test_packages.json'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/b2g_aries_debug.yml
+++ /dev/null
@@ -1,37 +0,0 @@
-$inherits:
-  from: 'tasks/builds/b2g_phone_eng_base.yml'
-  variables:
-    build_name: 'aries'
-    build_type: 'debug'
-task:
-  scopes:
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-aries-eng-debug'
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-aries-eng-debug-objdir-gecko'
-    - 'docker-worker:relengapi-proxy:tooltool.download.internal'
-    - 'docker-worker:relengapi-proxy:tooltool.download.public'
-  metadata:
-    name: '[TC] B2G Aries Debug'
-
-  payload:
-    cache:
-      level-{{level}}-{{project}}-build-aries-eng-debug: /home/worker/workspace
-      level-{{level}}-{{project}}-build-aries-eng-debug-objdir-gecko: /home/worker/objdir-gecko
-    features:
-      relengAPIProxy: true
-    env:
-      TARGET: 'aries'
-      B2G_DEBUG: 1
-  extra:
-    treeherderEnv:
-      - production
-      - staging
-    treeherder:
-      symbol: Bd
-      groupSymbol: Aries
-      groupName: Aries Device Image
-      machine:
-        platform: b2g-device-image
-      collection:
-        debug: true
-    locations:
-      img: 'private/build/aries.zip'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/b2g_aries_eng.yml
+++ /dev/null
@@ -1,34 +0,0 @@
-$inherits:
-  from: 'tasks/builds/b2g_phone_eng_base.yml'
-  variables:
-    build_name: 'aries-eng'
-    build_type: 'opt'
-task:
-  scopes:
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-aries-eng-opt'
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-aries-eng-opt-objdir-gecko'
-    - 'docker-worker:relengapi-proxy:tooltool.download.internal'
-    - 'docker-worker:relengapi-proxy:tooltool.download.public'
-  metadata:
-    name: '[TC] B2G Aries Eng'
-
-  payload:
-    cache:
-      level-{{level}}-{{project}}-build-aries-eng-opt: /home/worker/workspace
-      level-{{level}}-{{project}}-build-aries-eng-opt-objdir-gecko: /home/worker/objdir-gecko
-    features:
-      relengAPIProxy: true
-    env:
-      TARGET: 'aries'
-  extra:
-    treeherderEnv:
-      - production
-      - staging
-    treeherder:
-      symbol: Be
-      groupSymbol: Aries
-      groupName: Aries Device Image
-      machine:
-        platform: b2g-device-image
-    locations:
-      img: 'private/build/aries.zip'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/b2g_base.yml
+++ /dev/null
@@ -1,16 +0,0 @@
-$inherits:
-  from: 'tasks/docker_build.yml'
-  variables:
-    build_product: 'b2g'
-docker-image: builder
-task:
-  payload:
-    image:
-      type: 'task-image'
-      path: 'public/image.tar'
-      taskId:
-        task-reference: "<docker-image>"
-  extra:
-    locations:
-      test_packages: 'public/build/target.test_packages.json'
-      mozharness: 'public/build/mozharness.zip'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/b2g_nexus_5l_debug.yml
+++ /dev/null
@@ -1,37 +0,0 @@
-$inherits:
-  from: 'tasks/builds/b2g_phone_eng_base.yml'
-  variables:
-    build_name: 'nexus-5-l-eng'
-    build_type: 'debug'
-task:
-  scopes:
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-nexus-5l-eng-debug'
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-nexus-5l-eng-debug-objdir-gecko'
-    - 'docker-worker:relengapi-proxy:tooltool.download.internal'
-    - 'docker-worker:relengapi-proxy:tooltool.download.public'
-  metadata:
-    name: '[TC] B2G Nexus 5-L Debug'
-
-  payload:
-    cache:
-      level-{{level}}-{{project}}-build-nexus-5l-eng-debug: /home/worker/workspace
-      level-{{level}}-{{project}}-build-nexus-5l-eng-debug-objdir-gecko: /home/worker/objdir-gecko
-    features:
-      relengAPIProxy: true
-    env:
-      TARGET: 'nexus-5-l'
-      B2G_DEBUG: 1
-  extra:
-    treeherderEnv:
-      - production
-      - staging
-    treeherder:
-      symbol: Bd
-      groupSymbol: Nexus 5-L
-      groupName: Nexus 5-L Device Image
-      machine:
-        platform: b2g-device-image
-      collection:
-        debug: true
-    locations:
-      img: 'private/build/nexus-5-l.zip'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/b2g_nexus_5l_eng.yml
+++ /dev/null
@@ -1,34 +0,0 @@
-$inherits:
-  from: 'tasks/builds/b2g_phone_eng_base.yml'
-  variables:
-    build_name: 'nexus-5-l-eng'
-    build_type: 'opt'
-task:
-  scopes:
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-nexus-5l-eng-opt'
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-nexus-5l-eng-opt-objdir-gecko'
-    - 'docker-worker:relengapi-proxy:tooltool.download.internal'
-    - 'docker-worker:relengapi-proxy:tooltool.download.public'
-  metadata:
-    name: '[TC] B2G Nexus 5-L Eng'
-
-  payload:
-    cache:
-      level-{{level}}-{{project}}-build-nexus-5l-eng-opt: /home/worker/workspace
-      level-{{level}}-{{project}}-build-nexus-5l-eng-opt-objdir-gecko: /home/worker/objdir-gecko
-    features:
-      relengAPIProxy: true
-    env:
-      TARGET: 'nexus-5-l'
-  extra:
-    treeherderEnv:
-      - production
-      - staging
-    treeherder:
-      symbol: Be
-      groupSymbol: Nexus 5-L
-      groupName: Nexus 5-L Device Image
-      machine:
-        platform: b2g-device-image
-    locations:
-      img: 'private/build/nexus-5-l.zip'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/b2g_phone_base.yml
+++ /dev/null
@@ -1,27 +0,0 @@
-$inherits:
-  from: 'tasks/phone_build.yml'
-task:
-  metadata:
-    description: |
-      Android phones + b2g environment used in full stack testing.
-  payload:
-    env:
-      MOZILLA_OFFICIAL: '1'
-      ENABLE_DEFAULT_BOOTANIMATION: 'true'
-      B2G_UPDATER: '1'
-      REPO_TRACE: 1
-      VARIANT: user
-
-    # Emulators can take a very long time to build!
-    maxRunTime: 14400
-
-  extra:
-    # Rather then enforcing particular conventions we require that all build
-    # tasks provide the "build" extra field to specify where the build and tests
-    # files are located.
-    locations:
-      build: 'private/build/b2g-android-arm.tar.gz'
-      tests: 'private/build/gaia.zip'
-      symbols: 'private/build/b2g-crashreporter-symbols.zip'
-      sources: 'private/build/sources.xml'
-

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/b2g_phone_eng_base.yml
+++ /dev/null
@@ -1,21 +0,0 @@
-$inherits:
-  from: 'tasks/builds/b2g_phone_base.yml'
-task:
-  workerType: flame-kk
-
-  extra:
-    treeherder:
-      tier: 3
-
-  payload:
-    env:
-      DEBUG: 0
-      VARIANT: eng
-      GAIA_OPTIMIZE: '1'
-      B2G_SYSTEM_APPS: '1'
-      MOZ_TELEMETRY_REPORTING: '1'
-      MOZ_CRASHREPORTER_NO_REPORT: '1'
-      GAIA_KEYBOARD_LAYOUTS: 'en,pt-BR,es,de,fr,pl,zh-Hans-Pinyin,zh-Hant-Zhuyin,en-Dvorak'
-      B2G_UPDATE_CHANNEL: 'default'
-      MOZHARNESS_CONFIG: b2g/taskcluster-phone-eng.py
-    command: ["/bin/bash", "-c", "checkout-gecko workspace && cd ./workspace/gecko/taskcluster/scripts/phone-builder && buildbot_step 'Build' ./build-phone.sh $HOME/workspace"]

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/base_linux32.yml
+++ /dev/null
@@ -1,53 +0,0 @@
-$inherits:
-  from: 'tasks/builds/firefox_docker_base.yml'
-  variables:
-    build_name: 'linux'
-task:
-  #workerType: ..
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.linux'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.linux'
-
-  scopes:
-    - 'docker-worker:cache:tooltool-cache'
-    - 'docker-worker:relengapi-proxy:tooltool.download.public'
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-{{build_name}}-{{build_type}}-workspace'
-
-  payload:
-    cache:
-      tooltool-cache: '/home/worker/tooltool-cache'
-      level-{{level}}-{{project}}-build-{{build_name}}-{{build_type}}-workspace: '/home/worker/workspace'
-
-    features:
-      relengAPIProxy: true
-
-    env:
-      MOZHARNESS_SCRIPT: 'mozharness/scripts/fx_desktop_build.py'
-      MOZHARNESS_CONFIG: 'builds/releng_base_linux_32_builds.py balrog/production.py'
-      MOZHARNESS_ACTIONS: 'get-secrets build check-test generate-build-stats update'
-      MH_BRANCH: {{project}}
-      MH_BUILD_POOL: taskcluster
-      # image paths
-      TOOLTOOL_CACHE: '/home/worker/tooltool-cache'
-      NEED_XVFB: true
-
-    maxRunTime: 36000
-
-    command: ["/bin/bash", "bin/build.sh"]
-
-  extra:
-    treeherderEnv:
-      - production
-      - staging
-    treeherder:
-      machine:
-        # see https://github.com/mozilla/treeherder/blob/master/ui/js/values.js
-        platform: linux32
-    # Rather then enforcing particular conventions we require that all build
-    # tasks provide the "build" extra field to specify where the build and tests
-    # files are located, relative to the task's artifacts URL
-    locations:
-      build: 'public/build/target.tar.bz2'
-      tests: 'public/build/target.tests.zip'
-

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/base_linux64.yml
+++ /dev/null
@@ -1,47 +0,0 @@
-$inherits:
-  from: 'tasks/builds/firefox_docker_base.yml'
-  variables:
-    build_name: 'linux64'
-task:
-  #workerType: ..
-
-  scopes:
-    - 'docker-worker:cache:tooltool-cache'
-    - 'docker-worker:relengapi-proxy:tooltool.download.public'
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-{{build_name}}-{{build_type}}-workspace'
-
-  payload:
-    cache:
-      tooltool-cache: '/home/worker/tooltool-cache'
-      level-{{level}}-{{project}}-build-{{build_name}}-{{build_type}}-workspace: '/home/worker/workspace'
-
-    features:
-      relengAPIProxy: true
-
-    env:
-      MOZHARNESS_SCRIPT: 'mozharness/scripts/fx_desktop_build.py'
-      MOZHARNESS_CONFIG: 'builds/releng_base_linux_64_builds.py balrog/production.py'
-      MOZHARNESS_ACTIONS: 'get-secrets build check-test generate-build-stats update'
-      MH_BRANCH: {{project}}
-      MH_BUILD_POOL: taskcluster
-      # image paths
-      TOOLTOOL_CACHE: '/home/worker/tooltool-cache'
-      NEED_XVFB: true
-
-    maxRunTime: 36000
-
-    command: ["/bin/bash", "bin/build.sh"]
-
-  extra:
-    treeherderEnv:
-      - production
-      - staging
-    treeherder:
-      machine:
-        # see https://github.com/mozilla/treeherder/blob/master/ui/js/values.js
-        platform: linux64
-    # Rather then enforcing particular conventions we require that all build
-    # tasks provide the "build" extra field to specify where the build and tests
-    # files are located, relative to the task's artifacts URL
-    locations:
-      build: 'public/build/target.tar.bz2'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/base_macosx64.yml
+++ /dev/null
@@ -1,50 +0,0 @@
-$inherits:
-  from: 'tasks/builds/firefox_docker_base.yml'
-task:
-
-  scopes:
-    - 'docker-worker:cache:tooltool-cache'
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-{{build_name}}-{{build_type}}-workspace'
-    - 'docker-worker:relengapi-proxy:tooltool.download.internal'
-    - 'docker-worker:relengapi-proxy:tooltool.download.public'
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.{{build_name}}'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.{{build_name}}'
-
-  payload:
-    cache:
-      tooltool-cache: '/home/worker/tooltool-cache'
-      level-{{level}}-{{project}}-build-{{build_name}}-{{build_type}}-workspace: '/home/worker/workspace'
-
-    features:
-      relengAPIProxy: true
-
-    env:
-      MOZHARNESS_SCRIPT: 'mozharness/scripts/fx_desktop_build.py'
-      MOZHARNESS_CONFIG: 'builds/releng_base_mac_64_cross_builds.py balrog/production.py'
-      MOZHARNESS_ACTIONS: 'get-secrets build generate-build-stats update'
-      MH_BRANCH: {{project}}
-      MH_BUILD_POOL: taskcluster
-      # image paths
-      TOOLTOOL_CACHE: '/home/worker/tooltool-cache'
-
-    maxRunTime: 36000
-
-    command: ["/bin/bash", "bin/build.sh"]
-
-  extra:
-    treeherderEnv:
-      - production
-      - staging
-    treeherder:
-      machine:
-        # see https://github.com/mozilla/treeherder/blob/master/ui/js/values.js
-        platform: osx-10-7
-    # Rather then enforcing particular conventions we require that all build
-    # tasks provide the "build" extra field to specify where the build and tests
-    # files are located.
-    locations:
-      build: 'public/build/target.dmg'
-      tests: 'public/build/target.tests.zip'
-

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/base_win32.yml
+++ /dev/null
@@ -1,5 +0,0 @@
-$inherits:
-  from: 'tasks/builds/firefox_windows_base.yml'
-  variables:
-    build_name: 'win32'
-    platform: 'windowsxp'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/base_win64.yml
+++ /dev/null
@@ -1,5 +0,0 @@
-$inherits:
-  from: 'tasks/builds/firefox_windows_base.yml'
-  variables:
-    build_name: 'win64'
-    platform: 'windows8-64'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/dbg_linux32.yml
+++ /dev/null
@@ -1,30 +0,0 @@
-$inherits:
-  from: 'tasks/builds/base_linux32.yml'
-  variables:
-    build_name: 'linux'
-    build_type: 'debug'
-task:
-  metadata:
-      name: '[TC] Linux32 Debug'
-      description: 'Linux32 Debug'
-
-  routes:
-    - 'coalesce.v1.builds.{{project}}.dbg_linux32'
-
-  workerType: 'gecko-{{level}}-b-linux'
-
-  payload:
-    supersederUrl: 'https://coalesce.mozilla-releng.net/v1/list/builds.{{project}}.dbg_linux32'
-
-    env:
-      MH_CUSTOM_BUILD_VARIANT_CFG: 'debug'
-
-  extra:
-    treeherder:
-      groupSymbol: tc
-      groupName: Submitted by taskcluster
-      symbol: B
-      tier: 2
-      collection:
-        debug: true
-

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/dbg_linux64.yml
+++ /dev/null
@@ -1,29 +0,0 @@
-$inherits:
-  from: 'tasks/builds/base_linux64.yml'
-  variables:
-    build_name: 'linux64'
-    build_type: 'debug'
-task:
-  metadata:
-      name: '[TC] Linux64 Debug'
-      description: 'Linux64 Debug'
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.linux64-debug'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.linux64-debug'
-
-  workerType: 'gecko-{{level}}-b-linux'
-
-  payload:
-    env:
-      MH_CUSTOM_BUILD_VARIANT_CFG: 'debug'
-
-  extra:
-    treeherder:
-      groupSymbol: tc
-      groupName: Submitted by taskcluster
-      symbol: B
-      tier: 1
-      collection:
-        debug: true
-

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/dbg_linux64_asan.yml
+++ /dev/null
@@ -1,31 +0,0 @@
-$inherits:
-  from: 'tasks/builds/base_linux64.yml'
-  variables:
-    build_name: 'linux64-asan'
-    build_type: 'debug'
-task:
-  metadata:
-      name: '[TC] Linux64 ASan Debug'
-      description: 'Linux64 ASan Debug'
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.linux64-asan'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.linux64-asan'
-
-  workerType: gecko-{{level}}-b-linux
-
-  payload:
-    env:
-      MH_CUSTOM_BUILD_VARIANT_CFG: 'asan-tc-and-debug'
-
-  extra:
-    treeherder:
-      groupSymbol: tc
-      groupName: Submitted by taskcluster
-      symbol: Bd
-      machine:
-        # see https://github.com/mozilla/treeherder/blob/master/ui/js/values.js
-        platform: linux64
-      collection:
-        asan: true
-      tier: 1

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/dbg_macosx64.yml
+++ /dev/null
@@ -1,23 +0,0 @@
-$inherits:
-  from: 'tasks/builds/base_macosx64.yml'
-  variables:
-    build_name: 'macosx64'
-    build_type: 'debug'
-task:
-  metadata:
-      name: '[TC] MacOSX64 Debug'
-      description: 'MacOSX64 Debug'
-
-  workerType: dbg-macosx64
-
-  payload:
-    env:
-      MH_CUSTOM_BUILD_VARIANT_CFG: 'cross-debug'
-  extra:
-    treeherder:
-      groupSymbol: tc
-      groupName: Submitted by taskcluster
-      symbol: B
-      tier: 2
-      collection:
-        debug: true

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/dbg_win32.yml
+++ /dev/null
@@ -1,10 +0,0 @@
-$inherits:
-  from: 'tasks/builds/base_win32.yml'
-  variables:
-    build_type: 'debug'
-
-task:
-  extra:
-    treeherder:
-      collection:
-        debug: true

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/dbg_win64.yml
+++ /dev/null
@@ -1,10 +0,0 @@
-$inherits:
-  from: 'tasks/builds/base_win64.yml'
-  variables:
-    build_type: 'debug'
-
-task:
-  extra:
-    treeherder:
-      collection:
-        debug: true

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/firefox_docker_base.yml
+++ /dev/null
@@ -1,20 +0,0 @@
-$inherits:
-  from: 'tasks/docker_build.yml'
-  variables:
-    build_product: 'firefox'
-docker-image: desktop-build
-task:
-  scopes:
-    - 'secrets:get:project/releng/gecko/build/level-{{level}}/*'
-  extra:
-    locations:
-      mozharness: 'public/build/mozharness.zip'
-      test_packages: 'public/build/target.test_packages.json'
-  payload:
-    image:
-      type: 'task-image'
-      path: 'public/image.tar'
-      taskId:
-        task-reference: "<docker-image>"
-    features:
-      taskclusterProxy: true

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/firefox_l10n_base.yml
+++ /dev/null
@@ -1,51 +0,0 @@
-$inherits:
-  from: 'tasks/l10n.yml'
-  variables:
-    platform: 'linux64'
-    build_name: 'linux64-l10n'
-    build_product: 'firefox'
-    build_type: 'opt'
-docker-image: desktop-build
-task:
-  scopes:
-    - 'docker-worker:cache:tooltool-cache'
-    - 'docker-worker:relengapi-proxy:tooltool.download.public'
-    - 'docker-worker:cache:level-{{level}}-{{project}}-l10n-{{build_name}}-workspace'
-
-  payload:
-    image:
-      type: 'task-image'
-      path: 'public/image.tar'
-      taskId:
-        task-reference: "<docker-image>"
-    cache:
-      tooltool-cache: '/home/worker/tooltool-cache'
-      level-{{level}}-{{project}}-l10n-{{build_name}}-workspace: '/home/worker/workspace'
-
-    features:
-      relengAPIProxy: true
-
-    env:
-      MOZHARNESS_SCRIPT: 'mozharness/scripts/desktop_l10n.py'
-      MOZHARNESS_CONFIG: 'single_locale/tc_{{platform}}.py'
-      MOZHARNESS_ACTIONS: 'clone-locales list-locales setup repack summary'
-      MOZHARNESS_OPTIONS: 'environment-config=single_locale/production.py branch-config=single_locale/{{project}}.py platform-config=single_locale/{{platform}}.py total-chunks=1 this-chunk=1'
-      JOB_SCRIPT: 'taskcluster/scripts/builder/build-l10n.sh'
-      MH_BRANCH: {{project}}
-      MH_BUILD_POOL: taskcluster
-      # image paths
-      TOOLTOOL_CACHE: '/home/worker/tooltool-cache'
-      NEED_XVFB: true
-
-    maxRunTime: 36000
-
-    command: ["/bin/bash", "bin/build.sh"]
-
-  extra:
-    treeherderEnv:
-      - production
-      - staging
-    treeherder:
-      machine:
-        # see https://github.com/mozilla/treeherder/blob/master/ui/js/values.js
-        platform: {{platform}}

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/firefox_l10n_linux32.yml
+++ /dev/null
@@ -1,19 +0,0 @@
-$inherits:
-  from: 'tasks/builds/firefox_l10n_base.yml'
-  variables:
-    build_name: 'linux32-l10n'
-    platform: 'linux32'
-task:
-  metadata:
-      name: '[TC] Linux32 L10n'
-      description: 'Linux32 L10n'
-
-  workerType: 'gecko-{{level}}-b-linux'
-
-  extra:
-    treeherder:
-      groupSymbol: tc
-      groupName: Submitted by taskcluster
-      tier: 2
-      symbol: L10n
-

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/firefox_l10n_linux64.yml
+++ /dev/null
@@ -1,19 +0,0 @@
-$inherits:
-  from: 'tasks/builds/firefox_l10n_base.yml'
-  variables:
-    build_name: 'linux64-l10n'
-    platform: 'linux64'
-task:
-  metadata:
-      name: '[TC] Linux64 L10n'
-      description: 'Linux64 L10n'
-
-  workerType: 'gecko-{{level}}-b-linux'
-
-  extra:
-    treeherder:
-      groupSymbol: tc
-      groupName: Submitted by taskcluster
-      tier: 2
-      symbol: L10n
-

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/firefox_windows_base.yml
+++ /dev/null
@@ -1,14 +0,0 @@
-$inherits:
-  from: 'tasks/windows_build.yml'
-  variables:
-    build_product: 'firefox'
-task:
-  metadata:
-    name: '[TC] Firefox {{build_name}} ({{build_type}})'
-    description: 'Firefox {{build_name}} {{build_type}}'
-  payload:
-    command:
-      - 'mkdir .\build\src'
-      - 'hg share c:\builds\hg-shared\mozilla-central .\build\src'
-      - 'hg pull -u -R .\build\src --rev %GECKO_HEAD_REV% %GECKO_HEAD_REPOSITORY%'
-      - 'c:\mozilla-build\python\python.exe .\build\src\testing\mozharness\scripts\fx_desktop_build.py --config builds\taskcluster_firefox_{{build_name}}_{{build_type}}.py --branch {{project}} --skip-buildbot-actions --work-dir %cd:Z:=z:%\build'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/haz_linux.yml
+++ /dev/null
@@ -1,60 +0,0 @@
-$inherits:
-  from: 'tasks/builds/firefox_docker_base.yml'
-  variables:
-    build_name: 'browser-haz'
-    build_type: 'debug'
-task:
-  metadata:
-    name: '[TC] Browser Hazard Linux'
-    description: Browser Hazard Analysis Linux
-
-  workerType: 'gecko-{{level}}-b-linux'
-
-  scopes:
-    - 'docker-worker:cache:tooltool-cache'
-    - 'docker-worker:relengapi-proxy:tooltool.download.public'
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-linux64-haz-debug-workspace'
-
-  payload:
-    cache:
-      level-{{level}}-{{project}}-build-linux64-haz-debug-workspace: '/home/worker/workspace'
-      tooltool-cache: '/home/worker/tooltool-cache'
-
-    features:
-      relengAPIProxy: true
-
-    env:
-      MOZCONFIG: 'browser/config/mozconfigs/linux64/hazards'
-      TOOLTOOL_CACHE: '/home/worker/tooltool-cache'
-      TOOLTOOL_MANIFEST: 'browser/config/tooltool-manifests/linux64/hazard.manifest'
-
-    maxRunTime: 36000
-
-    command:
-      - /bin/bash
-      - -c
-      - >
-        tc-vcs checkout workspace/gecko "$GECKO_BASE_REPOSITORY" "$GECKO_HEAD_REPOSITORY" "$GECKO_HEAD_REV" "$GECKO_HEAD_REF" &&
-        cd ./workspace/gecko/taskcluster/scripts/builder &&
-        ./build-haz-linux.sh --project browser $HOME/workspace
-
-  extra:
-    treeherderEnv:
-      - production
-      - staging
-    treeherder:
-      machine:
-        # see https://github.com/mozilla/treeherder/blob/master/ui/js/values.js
-        platform: linux64
-      groupSymbol: tc
-      groupName: Submitted by taskcluster for your pleasure
-      symbol: H
-      tier: 1
-      collection:
-        debug: true
-    # Rather then enforcing particular conventions we require that all build
-    # tasks provide the "build" extra field to specify where the build and tests
-    # files are located.
-    locations:
-      build: null
-      tests: null

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/haz_shell_linux.yml
+++ /dev/null
@@ -1,59 +0,0 @@
-$inherits:
-  from: 'tasks/builds/firefox_docker_base.yml'
-  variables:
-    build_name: 'shell-haz'
-    build_type: 'debug'
-task:
-  metadata:
-    name: '[TC] JS Shell Hazard Linux'
-    description: JS Shell Hazard Analysis Linux
-
-  workerType: 'gecko-{{level}}-b-linux'
-
-  scopes:
-    - 'docker-worker:cache:tooltool-cache'
-    - 'docker-worker:relengapi-proxy:tooltool.download.public'
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-linux64-shell-haz-debug-workspace'
-
-  payload:
-    cache:
-      level-{{level}}-{{project}}-build-linux64-shell-haz-debug-workspace: '/home/worker/workspace'
-      tooltool-cache: '/home/worker/tooltool-cache'
-
-    features:
-      relengAPIProxy: true
-
-    env:
-      TOOLTOOL_CACHE: '/home/worker/tooltool-cache'
-      TOOLTOOL_MANIFEST: 'browser/config/tooltool-manifests/linux64/hazard.manifest'
-
-    maxRunTime: 36000
-
-    command:
-      - /bin/bash
-      - -c
-      - >
-        tc-vcs checkout workspace/gecko "$GECKO_BASE_REPOSITORY" "$GECKO_HEAD_REPOSITORY" "$GECKO_HEAD_REV" "$GECKO_HEAD_REF" &&
-        cd ./workspace/gecko/taskcluster/scripts/builder &&
-        ./build-haz-linux.sh --project shell $HOME/workspace
-
-  extra:
-    treeherderEnv:
-      - production
-      - staging
-    treeherder:
-      machine:
-        # see https://github.com/mozilla/treeherder/blob/master/ui/js/values.js
-        platform: linux64
-      groupSymbol: SM-tc
-      groupName: SpiderMonkey, submitted by taskcluster
-      symbol: H
-      tier: 1
-      collection:
-        debug: true
-    # Rather then enforcing particular conventions we require that all build
-    # tasks provide the "build" extra field to specify where the build and tests
-    # files are located.
-    locations:
-      build: null
-      tests: null

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/linux64_clang.yml
+++ /dev/null
@@ -1,59 +0,0 @@
-$inherits:
-  from: 'tasks/build.yml'
-  variables:
-    build_product: firefox
-    build_name: 'linux64-clang'
-    build_type: 'opt'
-
-docker-image: desktop-build
-task:
-  metadata:
-    name: '[TC] Clang'
-    description: 'Clang'
-
-  workerType: 'gecko-{{level}}-b-linux'
-
-  scopes:
-    - 'docker-worker:cache:level-{{level}}-{{project}}-tc-vcs'
-    - 'docker-worker:cache:tooltool-cache'
-
-  payload:
-    image:
-      type: 'task-image'
-      path: 'public/image.tar'
-      taskId:
-        task-reference: "<docker-image>"
-
-    cache:
-      level-{{level}}-{{project}}-tc-vcs: '/home/worker/.tc-vcs'
-      tooltool-cache: '/home/worker/tooltool-cache'
-
-    env:
-      TOOLS_DISABLE: 'true'
-      TOOLTOOL_CACHE: '/home/worker/tooltool-cache'
-
-    maxRunTime: 36000
-
-    command: ["/bin/bash", "-c", "cd /home/worker/ && ./bin/checkout-sources.sh && ./workspace/build/src/taskcluster/scripts/misc/build-clang-linux.sh" ]
-
-    artifacts:
-      'public':
-        type: directory
-        path: '/home/worker/workspace/artifacts/'
-        expires:
-          relative-datestamp: "1 year"
-
-  extra:
-    treeherderEnv:
-      - staging
-      - production
-    treeherder:
-      groupSymbol: Cc
-      groupName: Compilers, submitted by taskcluster
-      symbol: Clang
-      tier: 1
-      machine:
-        platform: linux64
-    locations:
-        build: null
-        tests: null

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/linux64_gcc.yml
+++ /dev/null
@@ -1,59 +0,0 @@
-$inherits:
-  from: 'tasks/build.yml'
-  variables:
-    build_product: firefox
-    build_name: 'linux64-gcc'
-    build_type: 'opt'
-
-docker-image: desktop-build
-task:
-  metadata:
-    name: '[TC] GCC'
-    description: 'GCC'
-
-  workerType: 'gecko-{{level}}-b-linux'
-
-  scopes:
-    - 'docker-worker:cache:level-{{level}}-{{project}}-tc-vcs'
-    - 'docker-worker:cache:tooltool-cache'
-
-  payload:
-    image:
-      type: 'task-image'
-      path: 'public/image.tar'
-      taskId:
-        task-reference: "<docker-image>"
-
-    cache:
-      level-{{level}}-{{project}}-tc-vcs: '/home/worker/.tc-vcs'
-      tooltool-cache: '/home/worker/tooltool-cache'
-
-    env:
-      TOOLS_DISABLE: 'true'
-      TOOLTOOL_CACHE: '/home/worker/tooltool-cache'
-
-    maxRunTime: 36000
-
-    command: ["/bin/bash", "-c", "cd /home/worker/ && ./bin/checkout-sources.sh && ./workspace/build/src/taskcluster/scripts/misc/build-gcc-linux.sh" ]
-
-    artifacts:
-      'public':
-        type: directory
-        path: '/home/worker/workspace/artifacts/'
-        expires:
-          relative-datestamp: "1 year"
-
-  extra:
-    treeherderEnv:
-      - staging
-      - production
-    treeherder:
-      groupSymbol: Cc
-      groupName: Compilers, submitted by taskcluster
-      symbol: GCC
-      tier: 1
-      machine:
-        platform: linux64
-    locations:
-        build: null
-        tests: null

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/mobile_base.yml
+++ /dev/null
@@ -1,13 +0,0 @@
-$inherits:
-  from: 'tasks/docker_build.yml'
-  variables:
-    build_product: 'mobile'
-docker-image: desktop-build
-task:
-  payload:
-    image:
-      type: 'task-image'
-      path: 'public/image.tar'
-      taskId:
-        task-reference: "<docker-image>"
-

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/mulet_haz_linux.yml
+++ /dev/null
@@ -1,60 +0,0 @@
-$inherits:
-  from: 'tasks/builds/b2g_base.yml'
-  variables:
-    build_name: 'mulet-haz'
-    build_type: 'debug'
-task:
-  metadata:
-    name: '[TC] Mulet Hazard Linux'
-    description: Mulet Hazard Analysis Linux
-
-  workerType: mulet-debug
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.linux64-haz-mulet'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.linux64-haz-mulet'
-
-  scopes:
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-mulet-haz-linux-workspace'
-    - 'docker-worker:cache:tooltool-cache'
-    - 'docker-worker:relengapi-proxy:tooltool.download.public'
-
-  payload:
-    cache:
-      level-{{level}}-{{project}}-build-mulet-haz-linux-workspace: '/home/worker/workspace'
-      tooltool-cache: '/home/worker/tooltool-cache'
-
-    features:
-      relengAPIProxy: true
-
-    env:
-      MOZCONFIG: 'b2g/dev/config/mozconfigs/linux64/mulet-hazards'
-      TOOLTOOL_MANIFEST: 'gecko/b2g/dev/config/tooltool-manifests/linux64/hazard.manifest'
-      TOOLTOOL_CACHE: '/home/worker/tooltool-cache'
-
-    maxRunTime: 36000
-
-    command:
-      - /bin/bash
-      - -c
-      - >
-        checkout-gecko workspace &&
-        cd ./workspace/gecko/taskcluster/scripts/builder &&
-        buildbot_step 'Build' ./build-mulet-haz-linux.sh $HOME/workspace
-
-  extra:
-    treeherderEnv:
-      - production
-      - staging
-    treeherder:
-      groupSymbol: "tc"
-      symbol: "H"
-      tier: 3
-      machine:
-        platform: mulet-linux64
-    # Rather then enforcing particular conventions we require that all build
-    # tasks provide the "build" extra field to specify where the build and tests
-    # files are located.
-    locations:
-      build: null
-      tests: null

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/mulet_linux.yml
+++ /dev/null
@@ -1,59 +0,0 @@
-$inherits:
-  from: 'tasks/builds/b2g_base.yml'
-  variables:
-    build_name: 'mulet'
-    build_type: 'opt'
-task:
-  metadata:
-    name: '[TC] Mulet Linux'
-    description: Mulet Linux
-
-  workerType: mulet-opt
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.linux64-mulet'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.linux64-mulet'
-
-  scopes:
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-linux64-mulet-opt-workspace'
-    - 'docker-worker:cache:tooltool-cache'
-    - 'docker-worker:relengapi-proxy:tooltool.download.public'
-
-  payload:
-    cache:
-      level-{{level}}-{{project}}-build-linux64-mulet-opt-workspace: '/home/worker/workspace'
-      tooltool-cache: '/home/worker/tools/tooltool-cache'
-
-    features:
-      relengAPIProxy: true
-
-    env:
-      MOZCONFIG: 'b2g/dev/config/mozconfigs/linux64/mulet'
-      TOOLTOOL_MANIFEST: 'b2g/dev/config/tooltool-manifests/linux64/releng.manifest'
-
-    maxRunTime: 3600
-
-    command:
-      - /bin/bash
-      - -c
-      - >
-        checkout-gecko workspace &&
-        cd ./workspace/gecko/taskcluster/scripts/builder &&
-        buildbot_step 'Build' ./build-mulet-linux.sh $HOME/workspace
-
-  extra:
-    treeherderEnv:
-      - production
-      - staging
-    treeherder:
-      # Disable "TC" prefix...
-      groupSymbol: "?"
-      tier: 3
-      machine:
-        platform: mulet-linux64
-    # Rather then enforcing particular conventions we require that all build
-    # tasks provide the "build" extra field to specify where the build and tests
-    # files are located.
-    locations:
-      build: 'public/build/target.tar.bz2'
-      test_packages: 'public/build/target.test_packages.json'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/mulet_linux_dbg.yml
+++ /dev/null
@@ -1,61 +0,0 @@
-$inherits:
-  from: 'tasks/builds/b2g_base.yml'
-  variables:
-    build_name: 'mulet'
-    build_type: 'dbg'
-task:
-  metadata:
-    name: '[TC] Mulet Linux Dbg'
-    description: Mulet Linux Dbg
-
-  workerType: mulet-debug
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.linux64-mulet'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.linux64-mulet'
-
-  scopes:
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-linux64-mulet-debug-workspace'
-    - 'docker-worker:cache:tooltool-cache'
-    - 'docker-worker:relengapi-proxy:tooltool.download.public'
-
-  payload:
-    cache:
-      level-{{level}}-{{project}}-build-linux64-mulet-debug-workspace: '/home/worker/workspace'
-      tooltool-cache: '/home/worker/tools/tooltool-cache'
-
-    features:
-      relengAPIProxy: true
-
-    env:
-      MOZCONFIG: 'b2g/dev/config/mozconfigs/linux64/mulet_dbg'
-      TOOLTOOL_MANIFEST: 'b2g/dev/config/tooltool-manifests/linux64/releng.manifest'
-
-    maxRunTime: 3600
-
-    command:
-      - /bin/bash
-      - -c
-      - >
-        checkout-gecko workspace &&
-        cd ./workspace/gecko/taskcluster/scripts/builder &&
-        buildbot_step 'Build' ./build-mulet-linux.sh $HOME/workspace
-
-  extra:
-    treeherderEnv:
-      - production
-      - staging
-    treeherder:
-      # Disable "TC" prefix...
-      groupSymbol: "?"
-      tier: 3
-      machine:
-        platform: mulet-linux64
-      collection:
-        debug: true
-    # Rather then enforcing particular conventions we require that all build
-    # tasks provide the "build" extra field to specify where the build and tests
-    # files are located.
-    locations:
-      build: 'public/build/target.tar.bz2'
-      test_packages: 'public/build/target.test_packages.json'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/opt_linux32.yml
+++ /dev/null
@@ -1,24 +0,0 @@
-$inherits:
-  from: 'tasks/builds/base_linux32.yml'
-  variables:
-    build_name: 'linux'
-    build_type: 'opt'
-task:
-  metadata:
-      name: '[TC] Linux32 Opt'
-      description: 'Linux32 Opt'
-
-  routes:
-      - 'coalesce.v1.builds.{{project}}.opt_linux32'
-
-  workerType: 'gecko-{{level}}-b-linux'
-
-  payload:
-      supersederUrl: 'https://coalesce.mozilla-releng.net/v1/list/builds.{{project}}.opt_linux32'
-
-  extra:
-    treeherder:
-      groupSymbol: tc
-      groupName: Submitted by taskcluster
-      symbol: B
-      tier: 2

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/opt_linux64.yml
+++ /dev/null
@@ -1,22 +0,0 @@
-$inherits:
-  from: 'tasks/builds/base_linux64.yml'
-  variables:
-    build_name: 'linux64'
-    build_type: 'opt'
-task:
-  metadata:
-      name: '[TC] Linux64 Opt'
-      description: 'Linux64 Opt'
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.linux64'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.linux64'
-
-  workerType: 'gecko-{{level}}-b-linux'
-
-  extra:
-    treeherder:
-      groupSymbol: tc
-      groupName: Submitted by taskcluster
-      symbol: B
-      tier: 2

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/opt_linux64_artifact.yml
+++ /dev/null
@@ -1,29 +0,0 @@
-$inherits:
-  from: 'tasks/builds/base_linux64.yml'
-  variables:
-    build_name: 'linux64-artifact'
-    build_type: 'opt'
-task:
-  metadata:
-      name: '[TC] Linux64 Artifact Opt'
-      description: 'Linux64 Opt Artifact build'
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.linux64-artifact'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.linux64-artifact'
-
-  workerType: 'gecko-{{level}}-b-linux'
-
-  payload:
-    env:
-      MOZHARNESS_SCRIPT: 'mozharness/scripts/fx_desktop_build.py'
-      MOZHARNESS_CONFIG: 'builds/releng_sub_linux_configs/64_artifact.py balrog/production.py'
-      MOZHARNESS_ACTIONS: 'get-secrets build generate-build-stats'
-      DIST_UPLOADS: ''
-      DIST_TARGET_UPLOADS: ''
-
-  extra:
-    treeherder:
-      groupSymbol: "?"
-      symbol: AB
-      tier: 2

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/opt_linux64_asan.yml
+++ /dev/null
@@ -1,31 +0,0 @@
-$inherits:
-  from: 'tasks/builds/base_linux64.yml'
-  variables:
-    build_name: 'linux64-asan'
-    build_type: 'opt'
-task:
-  metadata:
-      name: '[TC] Linux64 ASan Opt'
-      description: 'Linux64 ASan Opt'
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.linux64-asan'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.linux64-asan'
-
-  workerType: gecko-{{level}}-b-linux
-
-  payload:
-    env:
-      MH_CUSTOM_BUILD_VARIANT_CFG: 'asan-tc'
-
-  extra:
-    treeherder:
-      groupSymbol: tc
-      groupName: Submitted by taskcluster
-      machine:
-        # see https://github.com/mozilla/treeherder/blob/master/ui/js/values.js
-        platform: linux64
-      symbol: Bo
-      collection:
-        asan: true
-      tier: 1

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/opt_linux64_pgo.yml
+++ /dev/null
@@ -1,35 +0,0 @@
-$inherits:
-  from: 'tasks/builds/base_linux64.yml'
-  variables:
-    build_name: 'linux64-pgo'
-    build_type: 'opt'
-task:
-  metadata:
-      name: '[TC] Linux64 PGO Opt'
-      description: 'Linux64 PGO Opt'
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.linux64-pgo'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.linux64-pgo'
-    - 'coalesce.v1.builds.{{project}}.linux64-pgo'
-
-  workerType: 'gecko-{{level}}-b-linux'
-
-  payload:
-    supersederUrl: 'https://coalesce.mozilla-releng.net/v1/list/builds.{{project}}.linux64-pgo'
-
-    env:
-      # add various options to mozharness command line run
-      MOZHARNESS_OPTIONS: 'enable-pgo'
-
-  extra:
-    treeherder:
-      groupSymbol: tc
-      groupName: Submitted by taskcluster
-      machine:
-        # see https://github.com/mozilla/treeherder/blob/master/ui/js/values.js
-        platform: linux64
-      symbol: B
-      tier: 2
-      collection:
-        pgo: true

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/opt_linux64_st-an.yml
+++ /dev/null
@@ -1,29 +0,0 @@
-$inherits:
-  from: 'tasks/builds/base_linux64.yml'
-  variables:
-    build_name: 'linux64-st-an'
-    build_type: 'opt'
-task:
-  metadata:
-      name: '[TC] Linux64 Static Analysis Opt'
-      description: 'Linux64 Static Analysis Opt'
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.linux64-st-an'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.linux64-st-an'
-
-  workerType: 'gecko-{{level}}-b-linux'
-
-  payload:
-    env:
-      MOZHARNESS_SCRIPT: 'mozharness/scripts/fx_desktop_build.py'
-      MOZHARNESS_CONFIG: 'builds/releng_sub_linux_configs/64_stat_and_opt.py balrog/production.py'
-      MOZHARNESS_ACTIONS: 'get-secrets build generate-build-stats'
-      DIST_UPLOADS: ''
-      DIST_TARGET_UPLOADS: ''
-
-  extra:
-    treeherder:
-      groupSymbol: "?"
-      symbol: S
-      tier: 1

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/opt_linux64_valgrind.yml
+++ /dev/null
@@ -1,32 +0,0 @@
-$inherits:
-  from: 'tasks/builds/base_linux64.yml'
-  variables:
-    build_name: 'linux64-valgrind'
-    build_type: 'opt'
-task:
-  metadata:
-      name: '[TC] Linux64 Valgrind Opt'
-      description: 'Linux64 Valgrind Opt'
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.linux64-valgrind'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.linux64-valgrind'
-
-  workerType: 'gecko-{{level}}-b-linux'
-
-  payload:
-    env:
-      MH_CUSTOM_BUILD_VARIANT_CFG: 'valgrind'
-      MOZHARNESS_ACTIONS: 'get-secrets build valgrind-test generate-build-stats'
-
-    maxRunTime: 72000
-
-  extra:
-    treeherder:
-      groupSymbol: tc
-      groupName: Submitted by taskcluster
-      symbol: V
-      machine:
-        # see https://github.com/mozilla/treeherder/blob/master/ui/js/values.js
-        platform: linux64
-      tier: 1

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/opt_macosx64.yml
+++ /dev/null
@@ -1,18 +0,0 @@
-$inherits:
-  from: 'tasks/builds/base_macosx64.yml'
-  variables:
-    build_name: 'macosx64'
-    build_type: 'opt'
-task:
-  metadata:
-      name: '[TC] MacOSX64 Opt'
-      description: 'MacOSX64 Opt'
-
-  workerType: opt-macosx64
-
-  extra:
-    treeherder:
-      groupSymbol: tc
-      groupName: Submitted by taskcluster
-      symbol: B
-      tier: 2

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/opt_macosx64_st-an.yml
+++ /dev/null
@@ -1,23 +0,0 @@
-$inherits:
-  from: 'tasks/builds/base_macosx64.yml'
-  variables:
-    build_name: 'macosx64-st-an'
-    build_type: 'opt'
-task:
-  metadata:
-      name: '[TC] MacOSX64 Static Analysis Opt'
-      description: 'MacOSX64 Static Analysis Opt'
-
-  workerType: opt-macosx64
-
-  payload:
-    env:
-      MH_CUSTOM_BUILD_VARIANT_CFG: 'cross-opt'
-      DIST_UPLOADS: ''
-      DIST_TARGET_UPLOADS: ''
-  extra:
-    treeherder:
-      groupSymbol: "?"
-      groupName: Submitted by taskcluster
-      symbol: S
-      tier: 1

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/opt_win32.yml
+++ /dev/null
@@ -1,4 +0,0 @@
-$inherits:
-  from: 'tasks/builds/base_win32.yml'
-  variables:
-    build_type: 'opt'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/opt_win64.yml
+++ /dev/null
@@ -1,4 +0,0 @@
-$inherits:
-  from: 'tasks/builds/base_win64.yml'
-  variables:
-    build_type: 'opt'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/sm_arm64_sim.yml
+++ /dev/null
@@ -1,15 +0,0 @@
-$inherits:
-  from: 'tasks/builds/sm_variant_base.yml'
-  variables:
-    build_name: 'sm-arm64-sim'
-    build_type: 'debug'
-task:
-  payload:
-    env:
-        SPIDERMONKEY_VARIANT: 'arm64-sim'
-  metadata:
-    name: '[TC] Spidermonkey ARM64 simulator'
-    description: 'Spidermonkey ARM64 simulator'
-  extra:
-    treeherder:
-      symbol: arm64

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/sm_arm_sim.yml
+++ /dev/null
@@ -1,15 +0,0 @@
-$inherits:
-  from: 'tasks/builds/sm_variant_base.yml'
-  variables:
-    build_name: 'sm-arm-sim'
-    build_type: 'debug'
-task:
-  payload:
-    env:
-        SPIDERMONKEY_VARIANT: 'arm-sim'
-  metadata:
-    name: '[TC] Spidermonkey ARM sim'
-    description: 'Spidermonkey ARM sim'
-  extra:
-    treeherder:
-      symbol: arm

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/sm_arm_sim_osx.yml
+++ /dev/null
@@ -1,15 +0,0 @@
-$inherits:
-  from: 'tasks/builds/sm_variant_base.yml'
-  variables:
-    build_name: 'sm-arm-sim-osx'
-    build_type: 'debug'
-task:
-  payload:
-    env:
-      SPIDERMONKEY_VARIANT: 'arm-sim-osx'
-  metadata:
-    name: '[TC] Spidermonkey ARM Simulator OSX'
-    description: 'Spidermonkey ARM Simulator OSX'
-  extra:
-    treeherder:
-      symbol: arm

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/sm_asan.yml
+++ /dev/null
@@ -1,17 +0,0 @@
-$inherits:
-  from: 'tasks/builds/sm_variant_base.yml'
-  variables:
-    build_name: 'sm-asan'
-    build_type: 'opt'
-task:
-  payload:
-    env:
-      SPIDERMONKEY_VARIANT: 'asan'
-      TOOLTOOL_MANIFEST: 'browser/config/tooltool-manifests/linux64/asan.manifest'
-  metadata:
-    name: '[TC] Spidermonkey Address Sanitizer'
-    description: 'Spidermonkey Address Sanitizer'
-  extra:
-    treeherder:
-      symbol: asan
-      tier: 1

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/sm_base.yml
+++ /dev/null
@@ -1,42 +0,0 @@
-$inherits:
-  from: 'tasks/builds/firefox_docker_base.yml'
-task:
-  workerType: 'gecko-{{level}}-b-linux'
-
-  routes:
-    - 'index.buildbot.branches.{{project}}.sm-plain'
-    - 'index.buildbot.revisions.{{head_rev}}.{{project}}.sm-plain'
-
-  scopes:
-    - 'docker-worker:cache:tooltool-cache'
-    - 'docker-worker:cache:level-{{level}}-{{project}}-build-spidermonkey-workspace'
-
-  payload:
-    cache:
-      tooltool-cache: '/home/worker/tooltool-cache'
-      level-{{level}}-{{project}}-build-spidermonkey-workspace: '/home/worker/workspace'
-
-    env:
-      MOZHARNESS_DISABLE: 'true'
-      TOOLS_DISABLE: 'true'
-      TOOLTOOL_CACHE: '/home/worker/tooltool-cache'
-
-    maxRunTime: 36000
-
-  extra:
-    treeherderEnv:
-      - staging
-      - production
-    treeherder:
-      groupSymbol: SM-tc
-      groupName: Spider Monkey, submitted by taskcluster
-      machine:
-        # see https://github.com/mozilla/treeherder/blob/master/ui/js/values.js
-        platform: linux64
-      tier: 1
-    # Rather then enforcing particular conventions we require that all build
-    # tasks provide the "build" extra field to specify where the build and tests
-    # files are located.
-    locations:
-      build: 'public/build/target.spidermonkey.tar.bz2'
-      tests: 'public/build/target.spidermonkey.tar.bz2'

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/sm_compacting.yml
+++ /dev/null
@@ -1,15 +0,0 @@
-$inherits:
-  from: 'tasks/builds/sm_variant_base.yml'
-  variables:
-    build_name: 'sm-compacting'
-    build_type: 'debug'
-task:
-  payload:
-    env:
-      SPIDERMONKEY_VARIANT: 'compacting'
-  metadata:
-    name: '[TC] Spidermonkey Compactng'
-    description: 'Spidermonkey Compacting'
-  extra:
-    treeherder:
-      symbol: cgc

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/sm_msan.yml
+++ /dev/null
@@ -1,17 +0,0 @@
-$inherits:
-  from: 'tasks/builds/sm_variant_base.yml'
-  variables:
-    build_name: 'sm-msan'
-    build_type: 'opt'
-task:
-  payload:
-    env:
-      SPIDERMONKEY_VARIANT: 'msan'
-      TOOLTOOL_MANIFEST: 'browser/config/tooltool-manifests/linux64/msan.manifest'
-  metadata:
-    name: '[TC] Spidermonkey Memory Sanitizer'
-    description: 'Spidermonkey Memory Sanitizer'
-  extra:
-    treeherder:
-      symbol: msan
-      tier: 1

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/sm_nonunified.yml
+++ /dev/null
@@ -1,17 +0,0 @@
-$inherits:
-  from: 'tasks/builds/sm_variant_base.yml'
-  variables:
-    build_name: 'sm-nonunified'
-    build_type: 'debug'
-task:
-  payload:
-    env:
-      SPIDERMONKEY_VARIANT: 'nonunified'
-  metadata:
-    name: '[TC] Spidermonkey Non-Unified Debug'
-    description: 'Spidermonkey Non-Unified Debug'
-  extra:
-    treeherder:
-      symbol: nu
-      collection:
-        debug: true

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/sm_package.yml
+++ /dev/null
@@ -1,18 +0,0 @@
-$inherits:
-  from: 'tasks/builds/sm_base.yml'
-  variables:
-    build_name: 'sm-package'
-    build_type: 'opt'
-task:
-  payload:
-    env:
-      SPIDERMONKEY_VARIANT: 'plain'
-
-    command: [ "/bin/bash", "-c", "cd /home/worker/ && ./bin/checkout-sources.sh && ./workspace/build/src/taskcluster/scripts/builder/build-sm-package.sh" ]
-
-  metadata:
-    name: '[TC] Spidermonkey Package'
-    description: 'Spidermonkey Package'
-  extra:
-    treeherder:
-      symbol: pkg

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/sm_plain.yml
+++ /dev/null
@@ -1,15 +0,0 @@
-$inherits:
-  from: 'tasks/builds/sm_variant_base.yml'
-  variables:
-    build_name: 'sm-plain'
-    build_type: 'opt'
-task:
-  payload:
-    env:
-      SPIDERMONKEY_VARIANT: 'plain'
-  metadata:
-    name: '[TC] Spidermonkey Plain'
-    description: 'Spidermonkey Plain'
-  extra:
-    treeherder:
-      symbol: p

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/sm_plaindebug.yml
+++ /dev/null
@@ -1,17 +0,0 @@
-$inherits:
-  from: 'tasks/builds/sm_variant_base.yml'
-  variables:
-    build_name: 'sm-plaindebug'
-    build_type: 'debug'
-task:
-  payload:
-    env:
-      SPIDERMONKEY_VARIANT: 'plaindebug'
-  metadata:
-    name: '[TC] Spidermonkey Plain Debug'
-    description: 'Spidermonkey Plain Debug'
-  extra:
-    treeherder:
-      symbol: p
-      collection:
-        debug: true

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/sm_rootanalysis.yml
+++ /dev/null
@@ -1,15 +0,0 @@
-$inherits:
-  from: 'tasks/builds/sm_variant_base.yml'
-  variables:
-    build_name: 'sm-rootanalysis'
-    build_type: 'debug'
-task:
-  payload:
-    env:
-      SPIDERMONKEY_VARIANT: 'rootanalysis'
-  metadata:
-    name: '[TC] Spidermonkey Root Analysis'
-    description: 'Spidermonkey Root Analysis'
-  extra:
-    treeherder:
-      symbol: r

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/sm_tsan.yml
+++ /dev/null
@@ -1,17 +0,0 @@
-$inherits:
-  from: 'tasks/builds/sm_variant_base.yml'
-  variables:
-    build_name: 'sm-tsan'
-    build_type: 'opt'
-task:
-  payload:
-    env:
-      SPIDERMONKEY_VARIANT: 'tsan'
-      TOOLTOOL_MANIFEST: 'browser/config/tooltool-manifests/linux64/tsan.manifest'
-  metadata:
-    name: '[TC] Spidermonkey Thread Sanitizer'
-    description: 'Spidermonkey Thread Sanitizer'
-  extra:
-    treeherder:
-      symbol: tsan
-      tier: 3

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/builds/sm_variant_base.yml
+++ /dev/null
@@ -1,5 +0,0 @@
-$inherits:
-  from: 'tasks/builds/sm_base.yml'
-task:
-  payload:
-    command: ["/bin/bash", "-c", "cd /home/worker/ && ./bin/checkout-sources.sh && ./workspace/build/src/taskcluster/scripts/builder/build-sm.sh" ]

deleted file mode 100644
--- a/taskcluster/ci/legacy/tasks/docker_build.yml
+++ /dev/null
@@ -1,27 +0,0 @@
-$inherits:
-  from: 'tasks/build.yml'
-
-
-task:
-  workerType: b2gbuild
-
-  routes:
-    - 'index.gecko.v1.{{project}}.revision.linux.{{head_rev}}.{{build_name}}.{{build_type}}'
-    - 'index.gecko.v1.{{project}}.latest.linux.{{build_name}}.{{build_type}}'
-
-  scopes:
-    # docker build tasks use tc-vcs so include the scope.
-    - 'docker-worker:cache:level-{{level}}-{{project}}-tc-vcs'
-
-  payload:
-
-    cache:
-      level-{{level}}-{{project}}-tc-vcs: '/home/worker/.tc-vcs'
-
-    # All docker builds share a common artifact directory for ease of uploading.
-    artifacts:
-      'public/build':
-        type: directory
-        path: '/home/worker/artifacts/'
-        expires:
-          relative-datestamp: '1 year'