Delete the GPU recipe and code that only it depended on.

scripts/slave/recipes/chromium_trybot.expected/webkit_tests_interrupted.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--master",
       "tryserver.blink",
       "--builder",
       "linux_blink_rel",
@@ skipping 290 matching lines @@
   },
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/runtest.py",
       "--target",
       "Release",
       "--no-xvfb",
       "--factory-properties",
-      "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"branch\": \"\", \"build_config\": \"Release\", \"buildername\": \"linux_blink_rel\", \"buildnumber\": 571, \"issue\": 12853011, \"mastername\": \"tryserver.blink\", \"patch_project\": \"chromium\", \"patchset\": 1, \"project\": \"chrome\", \"recipe\": \"chromium_trybot\", \"repository\": \"\", \"requester\": \"commit-bot@chromium.org\", \"revision\": null, \"rietveld\": \"https://codereview.chromium.org\", \"slavename\": \"TestSlavename\", \"swarm_hashes\": {\"angle_unittests\": \"[dummy hash for angle_unittests]\", \"content_gl_tests\": \"[dummy hash for content_gl_tests]\", \"gl_tests\": \"[dummy hash for gl_tests]\", \"gl_unittests\": \"[dummy hash for gl_unittests]\", \"gpu_unittests\": \"[dummy hash for gpu_unittests]\", \"tab_capture_end2end_tests\": \"[dummy hash for tab_capture_end2end_tests]\", \"telemetry_gpu_test\": \"[dummy hash for telemetry_gpu_test]\"}, \"workdir\": \"/path/to/workdir/TestSlavename\"}",
+      "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"branch\": \"\", \"build_config\": \"Release\", \"buildername\": \"linux_blink_rel\", \"buildnumber\": 571, \"issue\": 12853011, \"mastername\": \"tryserver.blink\", \"patch_project\": \"chromium\", \"patchset\": 1, \"project\": \"chrome\", \"recipe\": \"chromium_trybot\", \"repository\": \"\", \"requester\": \"commit-bot@chromium.org\", \"revision\": null, \"rietveld\": \"https://codereview.chromium.org\", \"slavename\": \"TestSlavename\", \"swarm_hashes\": {}, \"workdir\": \"/path/to/workdir/TestSlavename\"}",
       "--build-properties",
-      "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"branch\": \"\", \"build_config\": \"Release\", \"buildername\": \"linux_blink_rel\", \"buildnumber\": 571, \"issue\": 12853011, \"mastername\": \"tryserver.blink\", \"patch_project\": \"chromium\", \"patchset\": 1, \"project\": \"chrome\", \"recipe\": \"chromium_trybot\", \"repository\": \"\", \"requester\": \"commit-bot@chromium.org\", \"revision\": null, \"rietveld\": \"https://codereview.chromium.org\", \"slavename\": \"TestSlavename\", \"swarm_hashes\": {\"angle_unittests\": \"[dummy hash for angle_unittests]\", \"content_gl_tests\": \"[dummy hash for content_gl_tests]\", \"gl_tests\": \"[dummy hash for gl_tests]\", \"gl_unittests\": \"[dummy hash for gl_unittests]\", \"gpu_unittests\": \"[dummy hash for gpu_unittests]\", \"tab_capture_end2end_tests\": \"[dummy hash for tab_capture_end2end_tests]\", \"telemetry_gpu_test\": \"[dummy hash for telemetry_gpu_test]\"}, \"workdir\": \"/path/to/workdir/TestSlavename\"}",
+      "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"branch\": \"\", \"build_config\": \"Release\", \"buildername\": \"linux_blink_rel\", \"buildnumber\": 571, \"issue\": 12853011, \"mastername\": \"tryserver.blink\", \"patch_project\": \"chromium\", \"patchset\": 1, \"project\": \"chrome\", \"recipe\": \"chromium_trybot\", \"repository\": \"\", \"requester\": \"commit-bot@chromium.org\", \"revision\": null, \"rietveld\": \"https://codereview.chromium.org\", \"slavename\": \"TestSlavename\", \"swarm_hashes\": {}, \"workdir\": \"/path/to/workdir/TestSlavename\"}",
       "--step-name=webkit_tests (with patch)",
       "--builder-name=linux_blink_rel",
       "--slave-name=TestSlavename",
       "--build-number=571",
       "--run-python-script",
       "[BUILD]/scripts/slave/chromium/layout_test_wrapper.py",
       "--target",
       "Release",
       "-o",
       "[SLAVE_BUILD]/layout-test-results",
@@ skipping 54 matching lines @@
       "@@@STEP_FAILURE@@@",
       "@@@SET_BUILD_PROPERTY@failure_hash@\"a860d9d78c0340ef1c42d9fa74626fe7b110eeb0\"@@@"
     ]
   },
   {
     "name": "$result",
     "reason": "1 out of 1 aggregated steps failed. Failures: Step('webkit_tests') failed with return_code 1",
     "status_code": 1
   }
 ]