[scheduling API] Remove virtual tests

BlinkSchedulerDisableAntiStarvationForPriorities was enabled by default
in https://crrev.com/c/1952164, which obviates the need for these
virtual tests.

Bug: 979017
Change-Id: Ia520fb6370c635f8e3a6809583d1c31293968542
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1953746Reviewed-by: Nate Chapin <japhet@chromium.org>
Commit-Queue: Scott Haseley <shaseley@chromium.org>
Cr-Commit-Position: refs/heads/master@{#722691}

third_party/blink/web_tests/TestExpectations

@@ -5868,10 +5868,6 @@ crbug.com/989717 [ Fuchsia ] http/tests/preload/avoid_delaying_onload_link_prelo
 crbug.com/991243 [ Linux ] external/wpt/workers/semantics/multiple-workers/003.html [ Pass Timeout ]
 crbug.com/991243 [ Linux ] virtual/omt-worker-fetch/external/wpt/workers/semantics/multiple-workers/003.html [ Pass Timeout ]
 
-# Expected failure for experimental Scheduling API when running without the
-# BlinkSchedulerDisableAntiStarvationForPriorities feature.
-crbug.com/979017 wpt_internal/scheduler/task_order.html [ Failure ]
-
 # Expected failures for forced colors mode tests when the corresponding flags
 # are not enabled.
 crbug.com/970285 external/wpt/forced-colors-mode [ Failure ]

third_party/blink/web_tests/VirtualTestSuites

@@ -563,11 +563,6 @@
               "http/tests/media"],
     "args": ["--enable-features=AudioServiceOutOfProcess,AudioServiceSandbox,WebRtcApmInAudioService"]
   },
-  {
-    "prefix": "scheduler",
-    "bases": ["wpt_internal/scheduler"],
-    "args": ["--enable-features=BlinkSchedulerDisableAntiStarvationForPriorities"]
-  },
   {
     "prefix": "cross-origin-isolation",
     "bases": ["external/wpt/html/cross-origin-embedder-policy"],

third_party/blink/web_tests/virtual/scheduler/README.md

-This test suite is for testing that window.scheduler runs tasks in strict
-priority order, which currently depends on the
-BlinkSchedulerDisableAntiStarvationForPriorities feature.

third_party/blink/web_tests/virtual/scheduler/wpt_internal/scheduler/README.txt

-This tests a scheduler.postTask feature. It runs tests in wpt_internal/scheduler
-directory with the BlinkSchedulerDisableAntiStarvationForPriorities flag, which
-guarantees tasks are run in strict priority order.