--- a/testing/docker/tester/Dockerfile
+++ b/testing/docker/tester/Dockerfile
@@ -1,18 +1,15 @@
 FROM          taskcluster/base-test:0.1.3
 MAINTAINER    Jonas Finnemann Jensen <jopsen@gmail.com>
 
 # Add utilities and configuration
-COPY           b2g-desktop-config.py         /home/worker/b2g-desktop-config.py
 COPY           dot-config                    /home/worker/.config
 COPY           dot-pulse                     /home/worker/.pulse
 COPY           bin                           /home/worker/bin
-COPY           mozharness_configs            /home/worker/mozharness_configs
-COPY           buildprops.json               /home/worker/buildprops.json
 ADD            https://s3-us-west-2.amazonaws.com/test-caching/packages/linux64-stackwalk /usr/local/bin/linux64-minidump_stackwalk
 ADD            https://raw.githubusercontent.com/taskcluster/buildbot-step/master/buildbot_step /home/worker/bin/buildbot_step
 COPY           tc-vcs-config.yml /etc/taskcluster-vcs.yml
 
 # Run test setup script
 RUN chmod u+x /home/worker/bin/buildbot_step
 RUN chmod u+x /usr/local/bin/linux64-minidump_stackwalk
 RUN apt-get install -y python-pip && pip install virtualenv;

--- a/testing/docker/tester/VERSION
+++ b/testing/docker/tester/VERSION
@@ -1,1 +1,1 @@
-0.4.6
+0.4.7

deleted file mode 100644
--- a/testing/docker/tester/b2g-desktop-config.py
+++ /dev/null
@@ -1,29 +0,0 @@
-# This is a template config file for b2g desktop unittest production.
-import os
-
-config = {
-    # mozharness options
-    "application": "b2g",
-
-    "find_links": [
-        "http://pypi.pub.build.mozilla.org/pub",
-    ],
-    "pip_index": False,
-
-    "default_actions": [
-        'clobber',
-        'read-buildbot-config',
-        'download-and-extract',
-        'create-virtualenv',
-        'install',
-        'run-tests',
-    ],
-    "download_symbols": "ondemand",
-    "download_minidump_stackwalk": True,
-
-    "run_file_names": {
-        "mochitest": "runtestsb2g.py",
-        "reftest": "runreftestb2g.py",
-    },
-   "in_tree_config": "config/mozharness/b2g_desktop_config.py",
-}

deleted file mode 100644
--- a/testing/docker/tester/buildprops.json
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-  "properties": {
-    "buildername": ""
-  },
-  "sourcestamp": {
-    "changes": []
-  }
-}

deleted file mode 100644
--- a/testing/docker/tester/mozharness_configs/emulator_override.py
+++ /dev/null
@@ -1,4 +0,0 @@
-config = {
-    "exes": {},
-    "busybox_url": ""
-}

deleted file mode 100644
--- a/testing/docker/tester/mozharness_configs/gaia_integration_override.py
+++ /dev/null
@@ -1,4 +0,0 @@
-config = {
-    "exes": {},
-    "xre_url": ""
-}

deleted file mode 100644
--- a/testing/docker/tester/mozharness_configs/remove_executables.py
+++ /dev/null
@@ -1,6 +0,0 @@
-config = {
-    # We bake this directly into the tester image now...
-    "download_minidump_stackwalk": False,
-    "minidump_stackwalk_path": "/usr/local/bin/linux64-minidump_stackwalk",
-    "exes": {}
-}