Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_HTMLProgressElementWrappingImplementation.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 _HTMLProgressElementWrappingImplementation extends _HTMLElementWrappingImplementation implements HTMLProgressElement {
-  _HTMLProgressElementWrappingImplementation() : super() {}
-
-  static create__HTMLProgressElementWrappingImplementation() native {
-    return new _HTMLProgressElementWrappingImplementation();
-  }
-
-  HTMLFormElement get form() { return _get_form(this); }
-  static HTMLFormElement _get_form(var _this) native;
-
-  NodeList get labels() { return _get_labels(this); }
-  static NodeList _get_labels(var _this) native;
-
-  num get max() { return _get_max(this); }
-  static num _get_max(var _this) native;
-
-  void set max(num value) { _set_max(this, value); }
-  static void _set_max(var _this, num value) native;
-
-  num get position() { return _get_position(this); }
-  static num _get_position(var _this) native;
-
-  num get value() { return _get_value(this); }
-  static num _get_value(var _this) native;
-
-  void set value(num value) { _set_value(this, value); }
-  static void _set_value(var _this, num value) native;
-
-  String get typeName() { return "HTMLProgressElement"; }
-}