Remove Skia's forked buildbot code

master/skia_master_scripts/auto_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 canary_factory import CanaryFactory
-
-import builder_name_schema
-
-
-class AutoRollFactory(CanaryFactory):
-  """Factory which runs the Blink AutoRoll bot for Skia."""
-
-  def __init__(self, **kwargs):
-    """Instantiates an AutoRollFactory"""
-    CanaryFactory.__init__(self,
-                           flavor='chrome',
-                           path_to_skia=['third_party', 'skia'],
-                           **kwargs)
-
-  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='do_auto_roll.py', description='AutoRoll')
-    self.Validate()
-    return self
-