Remove smoothness.gpu_rasterization.key_mobile_sites_smooth benchmark.

tools/perf/benchmarks/smoothness.py

Index: tools/perf/benchmarks/smoothness.py
diff --git a/tools/perf/benchmarks/smoothness.py b/tools/perf/benchmarks/smoothness.py
index 0891977f268e0c7e56e2b43088fd441fe71727ff..e7c52f7a9130ebbb278ae2653b10c6a45ae8060f 100644
--- a/tools/perf/benchmarks/smoothness.py
+++ b/tools/perf/benchmarks/smoothness.py
@@ -197,23 +197,6 @@ class SmoothnessGpuRasterizationTop25(_Smoothness):
               possible_browser.platform.GetDeviceTypeName() == 'Nexus 5X')
 
 
-# crbug.com/589580 (This test should only be enabled on Android after fix.)
-@benchmark.Disabled('all')
-class SmoothnessGpuRasterizationKeyMobileSites(_Smoothness):
-  """Measures rendering statistics for the key mobile sites with GPU
-  rasterization.
-  """
-  tag = 'gpu_rasterization'
-  page_set = page_sets.KeyMobileSitesSmoothPageSet
-
-  def SetExtraBrowserOptions(self, options):
-    silk_flags.CustomizeBrowserOptionsForGpuRasterization(options)
-
-  @classmethod
-  def Name(cls):
-    return 'smoothness.gpu_rasterization.key_mobile_sites_smooth'
-
-
 class SmoothnessGpuRasterizationToughPathRenderingCases(_Smoothness):
   """Tests a selection of pages with SVG and 2D canvas paths with GPU
   rasterization.