Remove unused PerfTestSetup class

build/android/pylib/perf_tests_helper.py

 # Copyright (c) 2012 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 re
 import sys
 
 import android_commands
 import json
 import math
@@ skipping 161 matching lines @@
 
   def RestoreOriginalPerfMode(self):
     """Resets the original performance mode of the device."""
     self._SetScalingGovernorInternal(self._original_scaling_governor)
 
   def _SetScalingGovernorInternal(self, value):
     for cpu in range(self._kernel_max + 1):
       scaling_governor_file = PerfControl._SCALING_GOVERNOR_FMT % cpu
       if self._adb.FileExistsOnDevice(scaling_governor_file):
         self._adb.SetProtectedFileContents(scaling_governor_file, value)
-
-
-class PerfTestSetup(PerfControl):
-  """Provides methods for setting up a device for perf testing.
-
-     TODO(aberent): remove once all tests have been moved to the new classes
-  """
-
-  def DropRamCaches(self):
-    CacheControl(self._adb).DropRamCaches()
-
-  def SetUp(self):
-    self.SetHighPerfMode()
-    self.DropRamCaches()
-
-  def TearDown(self):
-    self.ResetOriginalPerfMode()