Remove all gyp[i] files in //chrome

chrome/installer/installer_tools.gyp

-# Copyright (c) 2011 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.
-
-{
-  'conditions': [
-    ['OS=="win"', {
-      'targets': [
-        {
-          # A target that is outdated if any of the mini_installer test sources
-          # are modified.
-          'target_name': 'test_installer_sentinel',
-          'type': 'none',
-          'includes': [
-            '../test/mini_installer/test_installer.gypi',
-          ],
-          'actions': [
-            {
-              'action_name': 'touch_sentinel',
-              'variables': {
-                'touch_sentinel_py': '../tools/build/win/touch_sentinel.py',
-              },
-              'inputs': [
-                '<@(test_installer_sources)',  # from test_installer.gypi
-                '<(touch_sentinel_py)',
-              ],
-              'outputs': [
-                '<(SHARED_INTERMEDIATE_DIR)/chrome/installer/test_installer_sentinel',
-              ],
-              'action': ['python', '<(touch_sentinel_py)', '<@(_outputs)'],
-            },
-          ],
-        },
-      ],
-    }],
-  ],
-}