Remove thread_times.polymer benchmark

This benchmark is broken, and benchmark owner no longer works on the Chromium
project.

Bug: 747000
Change-Id: Ideddacfdf10b4628eb660eb37bee270d4f339020
Reviewed-on: https://chromium-review.googlesource.com/581417Reviewed-by: Annie Sullivan <sullivan@chromium.org>
Commit-Queue: Annie Sullivan <sullivan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#488684}

tools/perf/benchmark.csv

@@ -114,7 +114,6 @@ thread_times.key_idle_power_cases,skyostil@chromium.org,
 thread_times.key_mobile_sites_smooth,,
 thread_times.key_noop_cases,,
 thread_times.key_silk_cases,vmiura@chromium.org,
-thread_times.polymer,ykyyip@chromium.org,
 thread_times.simple_mobile_sites,vmiura@chromium.org,
 thread_times.tough_compositor_cases,vmiura@chromium.org,
 thread_times.tough_scrolling_cases,tdresser@chromium.org,

tools/perf/benchmarks/thread_times.py

@@ -113,21 +113,6 @@ class ThreadTimesCompositorCases(_ThreadTimes):
     return page_sets.ToughCompositorCaseStoryExpectations()
 
 
-@benchmark.Enabled('android')
-@benchmark.Owner(emails=['ykyyip@chromium.org'])
-class ThreadTimesPolymer(_ThreadTimes):
-  """Measures timeline metrics while performing smoothness action on
-  Polymer cases."""
-  page_set = page_sets.PolymerPageSet
-
-  @classmethod
-  def Name(cls):
-    return 'thread_times.polymer'
-
-  def GetExpectations(self):
-    return page_sets.PolymerThreadTimesStoryExpectations()
-
-
 @benchmark.Enabled('android')
 @benchmark.Owner(emails=['skyostil@chromium.org'])
 class ThreadTimesKeyIdlePowerCases(_ThreadTimes):