Remove GYP files.

ios/chrome/common/physical_web/physical_web.gyp

-# 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: //ios/chrome/common/physical_web
-      'target_name': 'physical_web',
-      'type': 'static_library',
-      'sources': [
-        'ios_chrome_physical_web_data_source.h',
-        'ios_chrome_physical_web_data_source.mm',
-        'physical_web_device.h',
-        'physical_web_device.mm',
-        'physical_web_request.h',
-        'physical_web_request.mm',
-        'physical_web_scanner.h',
-        'physical_web_scanner.mm',
-        'physical_web_types.h',
-        'physical_web_types.mm',
-      ],
-      'dependencies': [
-        '../../../../base/base.gyp:base',
-        '../../../../components/components.gyp:physical_web_data_source',
-        '../../../../components/components.gyp:version_info',
-        '../../../../device/bluetooth/bluetooth.gyp:uribeacon',
-        '../../../../google_apis/google_apis.gyp:google_apis',
-        '../../../../ios/web/ios_web.gyp:user_agent',
-      ],
-      'link_settings': {
-        'libraries': [
-          '$(SDKROOT)/System/Library/Frameworks/CoreBluetooth.framework',
-          '$(SDKROOT)/System/Library/Frameworks/Foundation.framework',
-        ],
-      },
-    }
-  ]
-}