Remove all gyp[i] files in //chrome

chrome/browser/apps/app_shim/browser_app_shim.gypi

-# 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.
-
-{
-  'targets': [
-    {
-      # This is the part of the Chrome browser process responsible for launching
-      # and communicating with app_shim processes on Mac.
-      #
-      # GN version: //chrome/browser/apps/app_shim
-      'target_name': 'browser_app_shim',
-      'type': 'static_library',
-      'dependencies': [
-        # Since browser_app_shim and chrome.gyp:browser depend on each other,
-        # we omit the dependency on browser here.
-        '../content/content.gyp:content_browser',
-        '../content/content.gyp:content_common',
-      ],
-      'sources': [
-        'app_shim_handler_mac.cc',
-        'app_shim_handler_mac.h',
-        'app_shim_host_mac.cc',
-        'app_shim_host_mac.h',
-        'app_shim_host_manager_mac.h',
-        'app_shim_host_manager_mac.mm',
-        'extension_app_shim_handler_mac.cc',
-        'extension_app_shim_handler_mac.h',
-        'unix_domain_socket_acceptor.cc',
-        'unix_domain_socket_acceptor.h',
-      ],
-    },
-  ],  # targets
-}