Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_TextWrappingImplementation.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 _TextWrappingImplementation extends _CharacterDataWrappingImplementation implements Text {
-  _TextWrappingImplementation() : super() {}
-
-  static create__TextWrappingImplementation() native {
-    return new _TextWrappingImplementation();
-  }
-
-  String get wholeText() { return _get_wholeText(this); }
-  static String _get_wholeText(var _this) native;
-
-  Text replaceWholeText(String content) {
-    return _replaceWholeText(this, content);
-  }
-  static Text _replaceWholeText(receiver, content) native;
-
-  Text splitText(int offset) {
-    return _splitText(this, offset);
-  }
-  static Text _splitText(receiver, offset) native;
-
-  String get typeName() { return "Text"; }
-}