Remove stray references to update.sh

WATCHLISTS

 # 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.
 
 # Watchlist Rules
 # Refer: http://dev.chromium.org/developers/contributing-code/watchlists
 
 # IMPORTANT: The regular expression filepath is tested against each path using
 # re.search, so it is not usually necessary to add .*.
 
@@ skipping 228 matching lines @@
     'chromeos_power': {
       'filepath': 'ash/system/chromeos/power/|'\
                   'chromeos/dbus/power_.*|'\
                   'chrome/browser/chromeos/power/',
     },
     'chromeos_webui': {
       'filepath': 'chrome/browser/ui/webui/chromeos/|'\
                   'chrome/browser/resources/chromeos/',
     },
     'clang_update': {
-      'filepath': 'tools/clang/scripts/update.sh'
+      'filepath': 'tools/clang/scripts/update.py'
     },
     'clipboard': {
       'filepath': 'clipboard|dnd|drag|drop',
     },
     'closure': {
       'filepath': 'third_party/closure_(compiler|linter)/|'
                   'compiled_resources.gyp',
     },
     'components_deps': {
       'filepath': 'components/([^/]*/)*DEPS',
@@ skipping 1438 matching lines @@
                        'kinuko+worker@chromium.org',
                        'horo+watch@chromium.org',
                        'falken@chromium.org' ],
     'blink_wtf': [ 'mikhail.pozdnyakov@intel.com',
                    'blink-reviews-wtf@chromium.org' ],
     'blink_xmlhttprequest': [ 'tyoshino+watch@chromium.org' ],
     'test_runner': [ 'jochen+watch@chromium.org',
                      'mlamouri+watch-test-runner@chromium.org' ],
   },
 }