deleted file mode 100644
--- a/browser/config/mozconfigs/linux32/opt-dmd
+++ /dev/null
@@ -1,3 +0,0 @@
-ac_add_options --enable-dmd
-
-. "$topsrcdir/browser/config/mozconfigs/linux32/nightly"

deleted file mode 100644
--- a/browser/config/mozconfigs/linux64/opt-dmd
+++ /dev/null
@@ -1,3 +0,0 @@
-ac_add_options --enable-dmd
-
-. "$topsrcdir/browser/config/mozconfigs/linux64/nightly"

deleted file mode 100644
--- a/browser/config/mozconfigs/macosx64/opt-dmd
+++ /dev/null
@@ -1,3 +0,0 @@
-ac_add_options --enable-dmd
-
-. "$topsrcdir/browser/config/mozconfigs/macosx64/nightly"

deleted file mode 100644
--- a/browser/config/mozconfigs/win32/opt-dmd
+++ /dev/null
@@ -1,3 +0,0 @@
-ac_add_options --enable-dmd
-
-. "$topsrcdir/browser/config/mozconfigs/win32/nightly"

deleted file mode 100644
--- a/browser/config/mozconfigs/win64/opt-dmd
+++ /dev/null
@@ -1,3 +0,0 @@
-ac_add_options --enable-dmd
-
-. "$topsrcdir/browser/config/mozconfigs/win64/nightly"

--- a/taskcluster/ci/build/linux.yml
+++ b/taskcluster/ci/build/linux.yml
@@ -22,47 +22,16 @@ linux64/opt:
         tooltool-downloads: public
         need-xvfb: true
     toolchains:
         - linux64-clang
         - linux64-gcc
         - linux64-rust
         - linux64-sccache
 
-linux64-dmd/opt:
-    description: "Linux64 DMD Opt"
-    index:
-        product: firefox
-        job-name: linux64-dmd-opt
-    treeherder:
-        platform: linux64-dmd/opt
-        symbol: tc(Bdmd)
-        tier: 2
-    worker-type: aws-provisioner-v1/gecko-{level}-b-linux
-    worker:
-        max-run-time: 36000
-        env:
-            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/linux64/releng.manifest"
-    run:
-        using: mozharness
-        actions: [get-secrets build check-test update]
-        config:
-            - builds/releng_base_linux_64_builds.py
-        script: "mozharness/scripts/fx_desktop_build.py"
-        custom-build-variant-cfg: dmd
-        secrets: true
-        tooltool-downloads: public
-        need-xvfb: true
-    run-on-projects: [ ]
-    toolchains:
-        - linux64-clang
-        - linux64-gcc
-        - linux64-rust
-        - linux64-sccache
-
 linux64/pgo:
     description: "Linux64 PGO"
     index:
         product: firefox
         job-name: linux64-pgo
     treeherder:
         platform: linux64/pgo
         symbol: tc(B)

--- a/taskcluster/ci/build/macosx.yml
+++ b/taskcluster/ci/build/macosx.yml
@@ -54,48 +54,16 @@ macosx64/opt:
     toolchains:
         - linux64-cctools-port
         - linux64-clang
         - linux64-hfsplus
         - linux64-libdmg
         - linux64-rust-macos
         - linux64-sccache
 
-macosx64-dmd/opt:
-    description: "MacOS X x64 DMD Cross-compile"
-    index:
-        product: firefox
-        job-name: macosx64-dmd-opt
-    treeherder:
-        platform: osx-10-10-dmd/opt
-        symbol: tc(Bdmd)
-        tier: 2
-    worker-type: aws-provisioner-v1/gecko-{level}-b-macosx64
-    worker:
-        max-run-time: 36000
-        env:
-            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/macosx64/cross-releng.manifest"
-    run:
-        using: mozharness
-        actions: [get-secrets build update]
-        config:
-            - builds/releng_base_mac_64_cross_builds.py
-        script: "mozharness/scripts/fx_desktop_build.py"
-        custom-build-variant-cfg: dmd
-        secrets: true
-        tooltool-downloads: internal
-    run-on-projects: [ ]
-    toolchains:
-        - linux64-cctools-port
-        - linux64-clang
-        - linux64-hfsplus
-        - linux64-libdmg
-        - linux64-rust-macos
-        - linux64-sccache
-
 macosx64-devedition-nightly/opt:
     description: "MacOS X Dev Edition x64 Nightly"
     attributes:
         nightly: true
     index:
         product: devedition
         job-name: macosx64-opt
         type: nightly

--- a/taskcluster/ci/build/windows.yml
+++ b/taskcluster/ci/build/windows.yml
@@ -41,42 +41,16 @@ win32/opt:
         script: mozharness/scripts/fx_desktop_build.py
         config:
             - builds/taskcluster_firefox_windows_32_opt.py
     toolchains:
         - win32-clang-cl
         - win32-rust
         - win64-sccache
 
-win32-dmd/opt:
-    description: "Win32 DMD Opt"
-    index:
-        product: firefox
-        job-name: win32-dmd-opt
-    treeherder:
-        platform: windows2012-32-dmd/opt
-        symbol: tc(Bdmd)
-        tier: 2
-    worker-type: aws-provisioner-v1/gecko-{level}-b-win2012
-    worker:
-        max-run-time: 7200
-        env:
-            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win32/releng.manifest"
-    run:
-        using: mozharness
-        script: mozharness/scripts/fx_desktop_build.py
-        config:
-            - builds/taskcluster_firefox_windows_32_opt.py
-        custom-build-variant-cfg: dmd
-    run-on-projects: [ ]
-    toolchains:
-        - win32-clang-cl
-        - win32-rust
-        - win64-sccache
-
 win32/pgo:
     description: "Win32 Opt PGO"
     index:
         product: firefox
         job-name: win32-pgo
     treeherder:
         platform: windows2012-32/pgo
         symbol: tc(B)
@@ -140,42 +114,16 @@ win64/opt:
         script: mozharness/scripts/fx_desktop_build.py
         config:
             - builds/taskcluster_firefox_windows_64_opt.py
     toolchains:
         - win64-clang-cl
         - win64-rust
         - win64-sccache
 
-win64-dmd/opt:
-    description: "Win64 DMD Opt"
-    index:
-        product: firefox
-        job-name: win64-dmd-opt
-    treeherder:
-        platform: windows2012-64-dmd/opt
-        symbol: tc(Bdmd)
-        tier: 2
-    worker-type: aws-provisioner-v1/gecko-{level}-b-win2012
-    worker:
-        max-run-time: 7200
-        env:
-            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/win64/releng.manifest"
-    run:
-        using: mozharness
-        script: mozharness/scripts/fx_desktop_build.py
-        config:
-            - builds/taskcluster_firefox_windows_64_opt.py
-        custom-build-variant-cfg: dmd
-    run-on-projects: [ ]
-    toolchains:
-        - win64-clang-cl
-        - win64-rust
-        - win64-sccache
-
 win32-nightly/opt:
     description: "Win32 Nightly"
     index:
         product: firefox
         job-name: win32-opt
         type: nightly
     attributes:
         nightly: true

--- a/taskcluster/taskgraph/target_tasks.py
+++ b/taskcluster/taskgraph/target_tasks.py
@@ -377,26 +377,16 @@ def target_tasks_nightly_desktop(full_ta
     return list(
         set(target_tasks_nightly_win32(full_task_graph, parameters))
         | set(target_tasks_nightly_win64(full_task_graph, parameters))
         | set(target_tasks_nightly_macosx(full_task_graph, parameters))
         | set(target_tasks_nightly_linux(full_task_graph, parameters))
     )
 
 
-# Opt DMD builds should only run nightly
-@_target_task('nightly_dmd')
-def target_tasks_dmd(full_task_graph, parameters):
-    """Target DMD that run nightly on the m-c branch."""
-    def filter(task):
-        platform = task.attributes.get('build_platform', '')
-        return platform.endswith('-dmd')
-    return [l for l, t in full_task_graph.tasks.iteritems() if filter(t)]
-
-
 @_target_task('file_update')
 def target_tasks_file_update(full_task_graph, parameters):
     """Select the set of tasks required to perform nightly in-tree file updates
     """
     def filter(task):
         # For now any task in the repo-update kind is ok
         return task.kind in ['repo-update']
     return [l for l, t in full_task_graph.tasks.iteritems() if filter(t)]

--- a/taskcluster/taskgraph/transforms/gecko_v2_whitelist.py
+++ b/taskcluster/taskgraph/transforms/gecko_v2_whitelist.py
@@ -59,29 +59,27 @@ JOB_NAME_WHITELIST = set([
     'linux64-noopt-debug',
     'linux64-opt',
     'linux64-pgo',
     'linux64-rusttests-opt',
     'linux64-rusttests-debug',
     'linux64-st-an-debug',
     'linux64-st-an-opt',
     'linux64-valgrind-opt',
-    'linux64-dmd-opt',
     'macosx64-add-on-devel',
     'macosx64-clang-tidy',
     'macosx64-debug',
     'macosx64-nightly-repackage',
     'macosx64-nightly-repackage-signing',
     'macosx64-noopt-debug',
     'macosx64-opt',
     'macosx64-devedition-nightly-repackage',
     'macosx64-devedition-nightly-repackage-signing',
     'macosx64-st-an-debug',
     'macosx64-st-an-opt',
-    'macosx64-dmd-opt',
     'shell-haz-debug',
     'sm-arm-sim-debug',
     'sm-arm64-sim-debug',
     'sm-asan-opt',
     'sm-compacting-debug',
     'sm-win-compacting-debug',
     'sm-fuzzing',
     'sm-mozjs-sys-debug',
@@ -104,34 +102,32 @@ JOB_NAME_WHITELIST = set([
     'win32-nightly-repackage',
     'win32-nightly-repackage-signing',
     'win32-noopt-debug',
     'win32-opt',
     'win32-pgo',
     'win32-rusttests-opt',
     'win32-st-an-debug',
     'win32-st-an-opt',
-    'win32-dmd-opt',
     'win64-add-on-devel',
     'win64-clang-tidy',
     'win64-debug',
     'win64-devedition-opt',
     'win64-devedition-nightly-repackage',
     'win64-devedition-nightly-repackage-signing',
     'win64-nightly-repackage',
     'win64-nightly-repackage-signing',
     'win64-noopt-debug',
     'win64-opt',
     'win64-pgo',
     'win64-rusttests-opt',
     'win64-st-an-debug',
     'win64-st-an-opt',
     'win64-asan-debug',
     'win64-asan-opt',
-    'win64-dmd-opt',
     'win32-mingw32-debug',
 ])
 
 JOB_NAME_WHITELIST_ERROR = """\
 The gecko-v2 job name {} is not in the whitelist in gecko_v2_whitelist.py.
 If this job runs on Buildbot, please ensure that the job names match between
 Buildbot and TaskCluster, then add the job name to the whitelist.  If this is a
 new job, there is nothing to check -- just add the job to the whitelist.

deleted file mode 100644
--- a/testing/mozharness/configs/builds/releng_sub_linux_configs/32_dmd.py
+++ /dev/null
@@ -1,3 +0,0 @@
-config = {
-    'src_mozconfig': 'browser/config/mozconfigs/linux32/opt-dmd',
-}

deleted file mode 100644
--- a/testing/mozharness/configs/builds/releng_sub_linux_configs/64_dmd.py
+++ /dev/null
@@ -1,3 +0,0 @@
-config = {
-    'src_mozconfig': 'browser/config/mozconfigs/linux64/opt-dmd',
-}

deleted file mode 100644
--- a/testing/mozharness/configs/builds/releng_sub_mac_configs/64_dmd.py
+++ /dev/null
@@ -1,3 +0,0 @@
-config = {
-    'src_mozconfig': 'browser/config/mozconfigs/macosx64/opt-dmd',
-}

deleted file mode 100644
--- a/testing/mozharness/configs/builds/releng_sub_windows_configs/32_dmd.py
+++ /dev/null
@@ -1,3 +0,0 @@
-config = {
-    'src_mozconfig': 'browser/config/mozconfigs/win32/opt-dmd',
-}

deleted file mode 100644
--- a/testing/mozharness/configs/builds/releng_sub_windows_configs/64_dmd.py
+++ /dev/null
@@ -1,3 +0,0 @@
-config = {
-    'src_mozconfig': 'browser/config/mozconfigs/win64/opt-dmd',
-}

--- a/testing/mozharness/mozharness/mozilla/building/buildbase.py
+++ b/testing/mozharness/mozharness/mozilla/building/buildbase.py
@@ -378,17 +378,16 @@ class BuildOptionParser(object):
         'android-test': 'builds/releng_sub_%s_configs/%s_test.py',
         'android-checkstyle': 'builds/releng_sub_%s_configs/%s_checkstyle.py',
         'android-lint': 'builds/releng_sub_%s_configs/%s_lint.py',
         'android-findbugs': 'builds/releng_sub_%s_configs/%s_findbugs.py',
         'valgrind' : 'builds/releng_sub_%s_configs/%s_valgrind.py',
         'artifact': 'builds/releng_sub_%s_configs/%s_artifact.py',
         'debug-artifact': 'builds/releng_sub_%s_configs/%s_debug_artifact.py',
         'devedition': 'builds/releng_sub_%s_configs/%s_devedition.py',
-        'dmd': 'builds/releng_sub_%s_configs/%s_dmd.py',
     }
     build_pool_cfg_file = 'builds/build_pool_specifics.py'
     branch_cfg_file = 'builds/branch_specifics.py'
 
     @classmethod
     def _query_pltfrm_and_bits(cls, target_option, options):
         """ determine platform and bits