Remove support for downloading gold plugin.

build/download_gold_plugin.py

-#!/usr/bin/env python
-# Copyright 2015 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.
-
-"""Script to download LLVM gold plugin from google storage."""
-
-import find_depot_tools
-import json
-import os
-import shutil
-import subprocess
-import sys
-import zipfile
-
-SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__))
-CHROME_SRC = os.path.abspath(os.path.join(SCRIPT_DIR, os.pardir))
-
-
-DEPOT_PATH = find_depot_tools.add_depot_tools_to_path()
-GSUTIL_PATH = os.path.join(DEPOT_PATH, 'gsutil.py')
-
-LLVM_BUILD_PATH = os.path.join(CHROME_SRC, 'third_party', 'llvm-build',
-                               'Release+Asserts')
-CLANG_UPDATE_PY = os.path.join(CHROME_SRC, 'tools', 'clang', 'scripts',
-                               'update.py')
-CLANG_REVISION = os.popen(CLANG_UPDATE_PY + ' --print-revision').read().rstrip()
-
-CLANG_BUCKET = 'gs://chromium-browser-clang/Linux_x64'
-
-def main():
-  targz_name = 'llvmgold-%s.tgz' % CLANG_REVISION
-  remote_path = '%s/%s' % (CLANG_BUCKET, targz_name)
-
-  os.chdir(LLVM_BUILD_PATH)
-
-  subprocess.check_call(['python', GSUTIL_PATH,
-                         'cp', remote_path, targz_name])
-  subprocess.check_call(['tar', 'xzf', targz_name])
-  os.remove(targz_name)
-  return 0
-
-if __name__ == '__main__':
-  sys.exit(main())