Remove old annotated_steps buildbot scripts and dispatcher

tools/bots/fetch_reference_build.py

-#!/usr/bin/env python
-#
-# 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.
-
-"""Fetches an archived chromium build into
-  src/chrome/tools/test/reference_build unless
-  src/chrome/tools/test/reference_build/REQUESTED_REVISION is the same as
-  src/chrome/tools/test/reference_build/CURRENT_REVISION.
-  Must be run from the root of a Dartium or multivm checkout.
-
-Usage:
-  $ ./src/dart/tools/bots/fetch_reference_build_revision.py
-"""
-
-import os
-import subprocess
-import sys
-
-def main(argv):
-  dirname = os.path.join('src', 'chrome', 'tools',
-                        'test', 'reference_build')
-  request = os.path.join(dirname, 'REQUESTED_REVISION')
-  found = os.path.join(dirname, 'CURRENT_REVISION')
-  if not os.path.exists(request):
-    return
-  with file(request, 'r') as f:
-    request_revision = f.read()
-
-  if os.path.exists(found):
-    with file(found, 'r') as f:
-      found_revision = f.read()
-    if found_revision == request_revision:
-      return
-
-  get_script = os.path.join('src', 'dart', 'tools',
-                            'bots', 'get_chromium_build.py')
-  get_script = os.path.abspath(get_script)
-  exit_code = subprocess.call(['python', get_script,
-                               '-r', request_revision,
-                               '-t', dirname])
-  if exit_code == 0:
-    with file(found, 'w') as f:
-      f.write(request_revision)
-  return exit_code
-
-if __name__ == '__main__':
-  sys.exit(main(sys.argv))