Fix parsing of DOMString[] in IDL

client/dom/generated/src/interface/Clipboard.dart

 // Copyright (c) 2012, 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.
 
 interface Clipboard {
 
   String dropEffect;
 
   String effectAllowed;
 
   final FileList files;
 
   final DataTransferItemList items;
 
-  final List types;
-
   void clearData([String type]);
 
   void getData(String type);
 
   bool setData(String type, String data);
 
   void setDragImage(HTMLImageElement image, int x, int y);
 }