Remove GYP files.

google_apis/determine_use_official_keys.gypi

-# Copyright (c) 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.
-
-# Include this .gypi in your target to dynamically set the
-# use_official_google_api_keys variable (unless it is already
-# explicitly set) and the associated preprocessor define.
-
-{
-  'variables': {
-    'variables': {
-      # See documentation of this variable in //build/common.gypi.
-      'use_official_google_api_keys%': 2,
-    },
-
-    # Copy conditionally-set variables out one scope.
-    'use_official_google_api_keys%': '<(use_official_google_api_keys)',
-
-    'conditions': [
-      # If use_official_google_api_keys is already set (to 0 or 1), we
-      # do none of the implicit checking.  If it is set to 1 and the
-      # internal keys file is missing, the build will fail at compile
-      # time.  If it is set to 0 and keys are not provided by other
-      # means, a warning will be printed at compile time.
-      ['use_official_google_api_keys==2', {
-          'use_official_google_api_keys%':
-            '<!(python <(DEPTH)/google_apis/build/check_internal.py <(DEPTH)/google_apis/internal/google_chrome_api_keys.h)',
-        }],
-    ]
-  },
-
-  'conditions': [
-    ['use_official_google_api_keys==1', {
-        'defines': ['USE_OFFICIAL_GOOGLE_API_KEYS=1'],
-      }],
-  ],
-}