Remove GYP files from components.

components/precache/precache_defines.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.
-
-{
-  'variables': {
-    # These values are duplicated in the GN build in:
-    # //components/precache/core:precache_config
-    'precache_config_settings_url%': 'https://www.gstatic.com/chrome/wifiprefetch/precache_config',
-    'precache_manifest_url_prefix%': 'https://www.gstatic.com/chrome/wifiprefetch/hosts/',
-  },
-  'conditions': [
-    ['precache_config_settings_url != ""', {
-      'defines': [
-        'PRECACHE_CONFIG_SETTINGS_URL="<(precache_config_settings_url)"',
-      ],
-    }],
-    ['precache_manifest_url_prefix != ""', {
-      'defines': [
-        'PRECACHE_MANIFEST_URL_PREFIX="<(precache_manifest_url_prefix)"',
-      ],
-    }],
-  ],
-}