Remove app_shell chrome.shell API and ShellAppWindow

extensions/shell/common/api/api.gyp

Index: extensions/shell/common/api/api.gyp
diff --git a/extensions/shell/common/api/api.gyp b/extensions/shell/common/api/api.gyp
deleted file mode 100644
index 3421f05f5f458d59bc3604615615c304ffe00db0..0000000000000000000000000000000000000000
--- a/extensions/shell/common/api/api.gyp
+++ /dev/null
@@ -1,19 +0,0 @@
-# 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': [
-    {
-      'target_name': 'shell_api',
-      'type': 'static_library',
-      # TODO(jschuh): http://crbug.com/167187 size_t -> int
-      'msvs_disabled_warnings': [ 4267 ],
-      'includes': [
-        '../../../../build/json_schema_bundle_compile.gypi',
-        '../../../../build/json_schema_compile.gypi',
-        'schemas.gypi',
-      ],
-    },
-  ],
-}