Remove lib/dom directory!

lib/dom/templates/html/interface/interface_Event.darttemplate

-// 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.
-
-$!COMMENT
-interface $ID$EXTENDS default _$(ID)FactoryProvider {
-
-  // In JS, canBubble and cancelable are technically required parameters to
-  // init*Event. In practice, though, if they aren't provided they simply
-  // default to false (since that's Boolean(undefined)).
-  //
-  // Contrary to JS, we default canBubble and cancelable to true, since that's
-  // what people want most of the time anyway.
-  $ID(String type, [bool canBubble, bool cancelable]);
-$!MEMBERS}