[gwt-contrib] Removes a Java 1.6-ism. (issue1304801)

[rchandia]

Reviewers: knorton,

Description:
Removes a Java 1.6-ism.

Please review this at http://gwt-code-reviews.appspot.com/1304801/show

Affected files:
  M user/test/com/google/gwt/dev/jjs/test/singlejso/TypeHierarchyTest.java


Index:  
user/test/com/google/gwt/dev/jjs/test/singlejso/TypeHierarchyTest.java
===================================================================
--- user/test/com/google/gwt/dev/jjs/test/singlejso/TypeHierarchyTest.java	 
(revision 9561)
+++ user/test/com/google/gwt/dev/jjs/test/singlejso/TypeHierarchyTest.java	 
(working copy)
@@ -127,7 +127,6 @@
   }

   private static class JvmNode implements Node {
-    @Override
     public JvmNode appendChild(Node node) {
       return (JvmNode)node;
     }
@@ -149,7 +148,6 @@
   }

   private static class JsNode extends JavaScriptObject implements Node {
-    @Override
     public final native JsNode appendChild(Node node) /*-{
       return node;
     }-*/;


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