Remove GYP files from components.

components/captive_portal.gypi

-# Copyright 2014 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/captive_portal
-      'target_name': 'captive_portal',
-      'type': '<(component)',
-      'dependencies': [
-        '../base/base.gyp:base',
-        '../net/net.gyp:net',
-        '../url/url.gyp:url_lib',
-      ],
-      'include_dirs': [
-        '..',
-      ],
-      'defines': [
-        'CAPTIVE_PORTAL_IMPLEMENTATION',
-      ],
-      'sources': [
-        # Note: sources list duplicated in GN build.
-        'captive_portal/captive_portal_detector.cc',
-        'captive_portal/captive_portal_detector.h',
-        'captive_portal/captive_portal_export.h',
-        'captive_portal/captive_portal_types.cc',
-        'captive_portal/captive_portal_types.h',
-      ],
-    },
-    {
-      # GN version: //components/captive_portal:test_support
-      'target_name': 'captive_portal_test_support',
-      'type': 'static_library',
-      'dependencies': [
-        'captive_portal',
-        '../base/base.gyp:base',
-        '../net/net.gyp:net',
-        '../url/url.gyp:url_lib',
-      ],
-      'sources': [
-        # Note: sources list duplicated in GN build.
-        'captive_portal/captive_portal_testing_utils.cc',
-        'captive_portal/captive_portal_testing_utils.h',
-      ],
-    },
-  ],
-}