Remove GYP files from components.

components/sync_bookmarks.gypi

-# 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.
-
-{
-  'targets': [
-    {
-      # GN version: //components/sync_bookmarks
-      'target_name': 'sync_bookmarks',
-      'type': 'static_library',
-      'dependencies': [
-        '../base/base.gyp:base',
-        '../components/sync.gyp:sync',
-        '../ui/gfx/gfx.gyp:gfx',
-        'bookmarks_browser',
-        'favicon_core',
-        'history_core_browser',
-        'sync.gyp:sync',
-        'undo_component',
-      ],
-      'include_dirs': [
-        '..',
-      ],
-      'sources': [
-        # Note: file list duplicated in GN build.
-        'sync_bookmarks/bookmark_change_processor.cc',
-        'sync_bookmarks/bookmark_change_processor.h',
-        'sync_bookmarks/bookmark_data_type_controller.cc',
-        'sync_bookmarks/bookmark_data_type_controller.h',
-        'sync_bookmarks/bookmark_model_associator.cc',
-        'sync_bookmarks/bookmark_model_associator.h',
-      ],
-    },
-  ],
-}