Fix 2 failing tests on windows.

editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/internal/directoryset/DirectorySetListener.java

Index: editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/internal/directoryset/DirectorySetListener.java
===================================================================
--- editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/internal/directoryset/DirectorySetListener.java	(revision 16302)
+++ editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/internal/directoryset/DirectorySetListener.java	(working copy)
@@ -1,32 +0,0 @@
-/*
- * Copyright (c) 2012, the Dart project authors.
- * 
- * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
- * in compliance with the License. You may obtain a copy of the License at
- * 
- * http://www.eclipse.org/legal/epl-v10.html
- * 
- * Unless required by applicable law or agreed to in writing, software distributed under the License
- * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
- * or implied. See the License for the specific language governing permissions and limitations under
- * the License.
- */
-package com.google.dart.tools.core.internal.directoryset;
-
-/**
- * This interface is used by the {@link DirectorySetManager} to send {@link DirectorySetEvent}s to
- * interested components.
- * 
- * @see DirectorySetManager
- * @see DirectorySetListener
- * @see FilesView
- */
-public interface DirectorySetListener {
-  /**
-   * This methods is called from the {@link DirectorySetManager} whenever a changes has happened to
-   * the set of directories in the manager
-   * 
-   * @param event an event representing the change which occurred
-   */
-  public void directorySetChange(DirectorySetEvent event);
-}