Delete deprecated synced notifications code

sync/sync.gyp

 # Copyright 2013 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
 
   'includes': [
@@ skipping 485 matching lines @@
         'protocol/managed_user_shared_setting_specifics.proto',
         'protocol/managed_user_specifics.proto',
         'protocol/password_specifics.proto',
         'protocol/preference_specifics.proto',
         'protocol/priority_preference_specifics.proto',
         'protocol/search_engine_specifics.proto',
         'protocol/session_specifics.proto',
         'protocol/sync.proto',
         'protocol/sync_enums.proto',
         'protocol/synced_notification_app_info_specifics.proto',
-        'protocol/synced_notification_data.proto',
-        'protocol/synced_notification_render.proto',
         'protocol/synced_notification_specifics.proto',
         'protocol/test.proto',
         'protocol/theme_specifics.proto',
         'protocol/typed_url_specifics.proto',
         'protocol/unique_position.proto',
         'protocol/wifi_credential_specifics.proto',
       ],
       'variables': {
         'enable_wexit_time_destructors': 1,
         'proto_in_dir': './protocol',
@@ skipping 27 matching lines @@
       },
       'includes': [
         '../build/protoc.gypi'
       ],
       'defines': [
         'SYNC_IMPLEMENTATION'
       ],
     },
   ],
 }