Bug 1356240: Run win7 reftest-gpu jobs on TC r=RyanVM

MozReview-Commit-ID: BlvEr2Ya1Ow

--HG--
extra : rebase_source : 1a9de150594b6d03f51ebee611a35e136376a31e

taskcluster/ci/test/tests.yml

@@ -1025,31 +1025,19 @@ reftest-gpu:
     description: "Reftest GPU run"
     suite: reftest/reftest-gpu
     treeherder-symbol: tc-R(Rg)
-    chunks:
-        by-test-platform:
-            # Remove special casing when debug isn't using BBB anymore
-            windows7-32.*/debug: 1
-            default: 8
+    chunks: 8
     run-on-projects:
         by-test-platform:
             windows10.*: []
             windows8-64.*: []
             default: built-projects
-    worker-type:
-        by-test-platform:
-            windows7-32.*/debug: buildbot-bridge/buildbot-bridge
-            default: null
     instance-size: default
     virtualization: virtual-with-gpu
     max-run-time: 3600
     mozharness:
         script: desktop_unittest.py
         no-read-buildbot-config: true
-        chunked:
-            # Remove special casing when debug isn't using BBB anymore
-            by-test-platform:
-                windows7-32.*/debug: false
-                default: true
+        chunked: true
         config:
             by-test-platform:
                 windows.*: