[tools/perf] Remove smoothness.tough_animated_image_cases

tools/perf/benchmarks/smoothness.py

 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 import multiprocessing
 
 from core import perf_benchmark
 
 from benchmarks import silk_flags
 from measurements import smoothness
 import page_sets
@@ skipping 422 matching lines @@
 class SmoothnessPathologicalMobileSites(_Smoothness):
   """Measures task execution statistics while scrolling pathological sites.
   """
   page_set = page_sets.PathologicalMobileSitesPageSet
 
   @classmethod
   def Name(cls):
     return 'smoothness.pathological_mobile_sites'
 
 
-class SmoothnessToughAnimatedImageCases(_Smoothness):
-  page_set = page_sets.ToughAnimatedImageCasesPageSet
-
-  @classmethod
-  def Name(cls):
-    return 'smoothness.tough_animated_image_cases'
-
-
 class SmoothnessToughTextureUploadCases(_Smoothness):
   page_set = page_sets.ToughTextureUploadCasesPageSet
 
   @classmethod
   def Name(cls):
     return 'smoothness.tough_texture_upload_cases'
 
 
 class SmoothnessToughAdCases(_Smoothness):
   """Measures rendering statistics while displaying advertisements."""
@@ skipping 28 matching lines @@
   """Measures rendering statistics while scrolling advertisements."""
   page_set = page_sets.SyntheticToughWebglAdCasesPageSet
 
   @classmethod
   def Name(cls):
     return 'smoothness.tough_webgl_ad_cases'
 
   @classmethod
   def ShouldDisable(cls, possible_browser):
     return cls.IsSvelte(possible_browser)  # http://crbug.com/574485