fix java 1.6 code

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/docvalues@1132457 13f79535-47bb-0310-9956-ffa450edef68

lucene/src/java/org/apache/lucene/index/ParallelReader.java

@@ -584,7 +584,7 @@ public class ParallelReader extends IndexReader {
       fields.put(field, perDocs.docValues(field));
     }
 
-    @Override
+    //@Override -- not until Java 1.6
     public void close() throws IOException {
       // nothing to do here
     }