Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_HTMLOptGroupElementWrappingImplementation.dart

Index: client/dom/generated/src/wrapping/_HTMLOptGroupElementWrappingImplementation.dart
diff --git a/client/dom/generated/src/wrapping/_HTMLOptGroupElementWrappingImplementation.dart b/client/dom/generated/src/wrapping/_HTMLOptGroupElementWrappingImplementation.dart
deleted file mode 100644
index 1a32176b8388f8a81e4b5e5ae8b14db75dd81c0e..0000000000000000000000000000000000000000
--- a/client/dom/generated/src/wrapping/_HTMLOptGroupElementWrappingImplementation.dart
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-// WARNING: Do not edit - generated code.
-
-class _HTMLOptGroupElementWrappingImplementation extends _HTMLElementWrappingImplementation implements HTMLOptGroupElement {
-  _HTMLOptGroupElementWrappingImplementation() : super() {}
-
-  static create__HTMLOptGroupElementWrappingImplementation() native {
-    return new _HTMLOptGroupElementWrappingImplementation();
-  }
-
-  bool get disabled() { return _get_disabled(this); }
-  static bool _get_disabled(var _this) native;
-
-  void set disabled(bool value) { _set_disabled(this, value); }
-  static void _set_disabled(var _this, bool value) native;
-
-  String get label() { return _get_label(this); }
-  static String _get_label(var _this) native;
-
-  void set label(String value) { _set_label(this, value); }
-  static void _set_label(var _this, String value) native;
-
-  String get typeName() { return "HTMLOptGroupElement"; }
-}