Bug 1388569 - Remove sccache dependencies on jobs that don't use it. r=gps

There are essentially four categories of jobs that have dependencies on
sccache currently and that shouldn't:
- jobs that don't compile anything. They just inherited the dependency
  because they were using the same tooltool manifests as compiling
  builds.
- jobs that don't use sccache. Ideally, we'd make them use sccache, but
  things are not currently setup to make that easy, so we'll keep that for
  later.
- jobs that explicitly disable sccache through needs-sccache: false.
  Like above, ideally, they would use sccache.
- jobs that can't use sccache. Those are hazard jobs, that rely on a GCC
  plugin and AIUI on a global knowledge of the code, which the plugin needs
  to see. Caching would break that.

--HG--
extra : rebase_source : 77455b9f0a58919838c8c64c36aa1db99baf8c7e

taskcluster/ci/android-stuff/kind.yml

@@ -74,8 +74,6 @@ jobs:
               - "testing/mozharness/configs/builds/releng_sub_android_configs/*gradle_dependencies.py"
               - "**/*.gradle"
               - "taskcluster/docker/android-gradle-build/**"
-        toolchains:
-          - linux64-sccache
 
     android-test:
         description: "Android armv7 unit tests"
@@ -124,8 +122,6 @@ jobs:
           - - skip-unless-changed
             - - "mobile/android/base/**"
               - "mobile/android/tests/background/junit4/**"
-        toolchains:
-          - linux64-sccache
 
     android-lint:
         description: "Android lint"
@@ -196,8 +192,6 @@ jobs:
               - "mobile/android/**/*.gradle"
               - "mobile/android/**/Makefile.in"
               - "mobile/android/**/moz.build"
-        toolchains:
-          - linux64-sccache
 
     android-checkstyle:
         description: "Android checkstyle"
@@ -252,8 +246,6 @@ jobs:
               - "mobile/android/**/*.gradle"
               - "mobile/android/**/Makefile.in"
               - "mobile/android/**/moz.build"
-        toolchains:
-          - linux64-sccache
 
     android-findbugs:
         description: "Android findbugs"
@@ -313,5 +305,3 @@ jobs:
               - "mobile/android/**/*.gradle"
               - "mobile/android/**/Makefile.in"
               - "mobile/android/**/moz.build"
-        toolchains:
-          - linux64-sccache

taskcluster/ci/artifact-build/kind.yml

@@ -44,4 +44,3 @@ jobs:
         toolchains:
           - linux64-clang
           - linux64-gcc
-          - linux64-sccache

taskcluster/ci/build/linux.yml

@@ -579,7 +579,6 @@ linux64-ccov/opt:
     toolchains:
         - linux64-clang
         - linux64-gcc
-        - linux64-sccache
 
 linux64-add-on-devel/opt:
     description: "Linux64 add-on-devel"

taskcluster/ci/hazard/kind.yml

@@ -46,7 +46,6 @@ jobs:
         toolchains:
             - linux64-clang
             - linux64-gcc
-            - linux64-sccache
 
     linux64-haz/debug:
         description: "Browser Hazard Analysis Linux"
@@ -68,4 +67,3 @@ jobs:
         toolchains:
             - linux64-clang
             - linux64-gcc
-            - linux64-sccache

taskcluster/ci/spidermonkey/kind.yml

@@ -61,7 +61,6 @@ job-defaults:
     toolchains:
         - linux64-clang
         - linux64-gcc
-        - linux64-sccache
 
 jobs:
     sm-package/opt: