Bug 1348688 - Sunset the external media tests on Linux TaskCluster. r=dustin

As part of the media teams ongoing sunsetting of the external media tests, we
are disabling tests once they become problematic. This disables the Linux
TaskCluster tests, which have been over represented in failures recently.

MozReview-Commit-ID: BOJ7TyL5LYC

--HG--
extra : rebase_source : 4c00ad9f91e92d88c3f5c5c6c8e8565c3aae42b9

taskcluster/ci/test/test-platforms.yml

@@ -25,29 +25,22 @@ linux32/opt:
     test-sets:
         -  linux32-tests
         -  linux32-opt-tests
-        - external-media-tests
-        - external-media-tests-slow
 linux32-nightly/opt:
     build-platform: linux-nightly/opt
     test-sets:
         -  linux32-tests
         -  linux32-opt-tests
-        - external-media-tests
-        - external-media-tests-slow
         - awsy
 
 linux64/debug:
     build-platform: linux64/debug
     test-sets:
         - common-tests
-        - external-media-tests
         - web-platform-tests
 linux64/opt:
     build-platform: linux64/opt
     test-sets:
         - common-tests
-        - external-media-tests
-        - external-media-tests-slow
         - web-platform-tests
         - opt-only-tests
         - desktop-screenshot-capture
@@ -56,7 +49,6 @@ linux64-nightly/opt:
     build-platform: linux64-nightly/opt
     test-sets:
         - common-tests
-        - external-media-tests
         - web-platform-tests
         - opt-only-tests
         - desktop-screenshot-capture
@@ -68,8 +60,6 @@ linux64-pgo/opt:
     build-platform: linux64-pgo/opt
     test-sets:
         - common-tests
-        - external-media-tests
-        - external-media-tests-slow
         - web-platform-tests
         - talos
 

taskcluster/ci/test/tests.yml

@@ -128,7 +128,6 @@ external-media-tests-twitch:
     e10s: false
     instance-size:
         by-test-platform:
-            linux.*: xlarge
             default: default
     tier: 2
     max-run-time: 5400