Remove GYP files.

ios/ios.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,
-   },
-  'targets': [
-    {
-      'target_name': 'ios',
-      'type': 'none',
-      'dependencies': [
-        'chrome/common/physical_web/physical_web.gyp:*',
-        'chrome/ios_chrome_tests.gyp:*',
-        'chrome/ios_share_extension_resources.gyp:*',
-        'chrome/ios_today_extension_resources.gyp:*',
-        'consumer/ios_consumer_base.gyp:*',
-        'crnet/crnet.gyp:*',
-        'crnet/crnet_consumer/crnet_consumer.gyp:*',
-        'crnet/crnet_pack.gyp:*',
-        'crnet/test/crnet_test.gyp:*',
-        'net/ios_net.gyp:*',
-        'net/ios_net_unittests.gyp:*',
-        'provider/ios_provider_chrome.gyp:*',
-        'provider/ios_provider_web.gyp:*',
-        'testing/ios_testing.gyp:*',
-        'web/ios_web.gyp:*',
-        'web/ios_web_inttests.gyp:*',
-        'web/ios_web_shell.gyp:*',
-        'web/ios_web_shell_tests.gyp:*',
-        'web/ios_web_unittests.gyp:*',
-      ],
-    },
-  ],
-}