Remove some redundant watchlists.

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 802 matching lines @@
                       'nektar+watch@chromium.org',
                       'plundblad+watch@chromium.org',
                       'yuzo+watch@chromium.org'],
     'activity_log': ['felt@chromium.org'],
     'android_infra': ['yfriedman+watch@chromium.org',
                       'klundberg+watch@chromium.org',
                       'jbudorick+watch@chromium.org'],
     'android_media': ['avayvod+watch@chromium.org'],
     'android_tab': ['avayvod+watch@chromium.org', 'dtrainor@chromium.org'],
     'android_webview': ['android-webview-reviews@chromium.org'],
-    'app_list': ['tfarina@chromium.org', 'chrome-apps-syd-reviews@chromium.org'],
-    'app_shortcuts': ['chrome-apps-syd-reviews@chromium.org'],
+    'app_list': ['tfarina@chromium.org',
+                 'mgiuca@chromium.org',
+                 'tapted@chromium.org'],
+    'app_shortcuts': ['mgiuca@chromium.org', 'tapted@chromium.org'],
     'appcache': ['michaeln@chromium.org'],
     'apps': ['tfarina@chromium.org', 'chromium-apps-reviews@chromium.org'],
     'ash': ['sadrul@chromium.org',
             'kalyan.kondapally@intel.com'],
     'aura': ['sadrul@chromium.org',
              'kalyan.kondapally@intel.com'],
     'aura_compositor': ['danakj+watch@chromium.org',
                         'jbauman+watch@chromium.org',
                         'piman+watch@chromium.org',
                         'sievers+watch@chromium.org',
@@ skipping 235 matching lines @@
                      'mcasas+watch@chromium.org',
                      'posciak+watch@chromium.org'],
     'website_settings': ['markusheintz@chromium.org'],
     'windows_sandboxing': ['wfh+watch@chromium.org'],
     'worker': ['jam@chromium.org'],
     'x11': ['derat+watch@chromium.org',
             'sadrul@chromium.org',
             'yusukes+watch@chromium.org'],
   },
 }