Remove Skia's forked buildbot code

master/skia_master_scripts/android_roll_factory.py

-# Copyright (c) 2014 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.
-
-
-from factory import SkiaFactory
-
-import builder_name_schema
-
-
-class AndroidRollFactory(SkiaFactory):
-  """Factory which rolls Skia revisions into Android."""
-
-  def Build(self, role=builder_name_schema.BUILDER_ROLE_HOUSEKEEPER,
-            clobber=None, **kwargs):
-    """Build and return the complete BuildFactory.
-
-    role: string; type of builder.
-    clobber: boolean indicating whether we should clean before building
-    """
-    if role != builder_name_schema.BUILDER_ROLE_HOUSEKEEPER:
-      raise Exception('Housekeeping builders must have role "%s"' %
-                      builder_name_schema.BUILDER_ROLE_HOUSEKEEPER)
-
-    self.UpdateSteps()
-    self.AddSlaveScript(script='sync_android.py', description='SyncAndroid')
-    self.AddSlaveScript(script='merge_into_android.py', description='Merge')
-    self.Validate()
-    return self
-