Remove generated directories with 100s of files.

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

-// 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 _HTMLLabelElementWrappingImplementation extends _HTMLElementWrappingImplementation implements HTMLLabelElement {
-  _HTMLLabelElementWrappingImplementation() : super() {}
-
-  static create__HTMLLabelElementWrappingImplementation() native {
-    return new _HTMLLabelElementWrappingImplementation();
-  }
-
-  HTMLElement get control() { return _get_control(this); }
-  static HTMLElement _get_control(var _this) native;
-
-  HTMLFormElement get form() { return _get_form(this); }
-  static HTMLFormElement _get_form(var _this) native;
-
-  String get htmlFor() { return _get_htmlFor(this); }
-  static String _get_htmlFor(var _this) native;
-
-  void set htmlFor(String value) { _set_htmlFor(this, value); }
-  static void _set_htmlFor(var _this, String value) native;
-
-  String get typeName() { return "HTMLLabelElement"; }
-}