Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_FileEntryWrappingImplementation.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 _FileEntryWrappingImplementation extends _EntryWrappingImplementation implements FileEntry {
-  _FileEntryWrappingImplementation() : super() {}
-
-  static create__FileEntryWrappingImplementation() native {
-    return new _FileEntryWrappingImplementation();
-  }
-
-  void createWriter(FileWriterCallback successCallback, [ErrorCallback errorCallback = null]) {
-    _createWriter(this, successCallback, errorCallback);
-    return;
-  }
-  static void _createWriter(receiver, successCallback, errorCallback) native;
-
-  void file(FileCallback successCallback, [ErrorCallback errorCallback = null]) {
-    _file(this, successCallback, errorCallback);
-    return;
-  }
-  static void _file(receiver, successCallback, errorCallback) native;
-
-  String get typeName() { return "FileEntry"; }
-}