Remove Skia's forked buildbot code

master/skia_master_scripts/chromeos_factory.py

-# Copyright (c) 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.
-
-
-"""Utility class to build the Skia master BuildFactory's for ChromeOS buildbots.
-
-Overrides SkiaFactory with any ChromeOS-specific steps."""
-
-
-from skia_master_scripts import factory as skia_factory
-from buildbot.process.properties import WithProperties
-
-
-class ChromeOSFactory(skia_factory.SkiaFactory):
-  """Overrides for ChromeOS builds."""
-
-  def __init__(self, board, **kwargs):
-    """ Instantiates a ChromeOSFactory with properties and build steps specific
-    to ChromeOS devices.
-
-    ssh_host: string indicating hostname or ip address of the target device
-    ssh_port: string indicating the ssh port on the target device
-    """
-    skia_factory.SkiaFactory.__init__(self, flavor='chromeos',
-                                      deps_target_os='chromeos', **kwargs)
-    self._common_args += ['--ssh_host', WithProperties('%(ssh_host:-None)s'),
-                          '--ssh_port', WithProperties('%(ssh_port:-None)s'),
-                          '--board', board]
-