Remove all gyp[i] files in //chrome

chrome/browser/ui/cocoa/notifications/notification_common.gyp

-# Copyright 2016 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: //chrome/browser/ui/notifications:common
-    'target_name': 'notification_common',
-    'type': 'static_library',
-      'include_dirs': [
-        '<(DEPTH)',
-      ],
-    'sources': [
-      'notification_builder_mac.h',
-      'notification_builder_mac.mm',
-      'notification_constants_mac.h',
-      'notification_constants_mac.mm',
-      'notification_response_builder_mac.h',
-      'notification_response_builder_mac.mm',
-    ],
-    'dependencies': [
-      '<(DEPTH)/base/base.gyp:base',
-      '<(DEPTH)/chrome/chrome_resources.gyp:chrome_strings',
-      '<(DEPTH)/ui/base/ui_base.gyp:ui_base',
-    ],
-  },
-],
-}