Remove Skia's forked buildbot code

run_unittests

 #!/usr/bin/env python
 # 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.
 
 """Runs all unit tests under this base directory."""
 
 import os
 import subprocess
 import sys
 import unittest
 
 
 BUILDBOT_PATH = os.path.dirname(os.path.abspath(__file__))
 
 
-# Add the buildbot directory to the path, in case the tests are being run from
-# elsewhere.
-sys.path.append(os.path.join(BUILDBOT_PATH, 'third_party', 'chromium_buildbot',
-                             'scripts'))
-
-
 GO_TESTS = [
   'perf',
 ]
 
 GO_TEST_FAILED = (
 '''======================================================================
 Go test failed: %s
 ----------------------------------------------------------------------
 %s
 ----------------------------------------------------------------------
@@ skipping 59 matching lines @@
     if error:
       errors.append(error)
 
   if errors:
     for error in errors:
       print error
     print 'Failed %d of %d.' % (len(errors), len(tests_to_run) + len(GO_TESTS))
     sys.exit(1)
   else:
     print 'All tests succeeded.'