fix for Java 7

uk/ac/sanger/artemis/components/MultiComparator.java

@@ -1074,10 +1074,6 @@ public class MultiComparator extends JFrame
    **/
   private void readAnEntry(final EntrySource this_source,
                            final EntryGroup entry_group)
-  {
-    SwingWorker entryWorker = new SwingWorker()
-    {
-      public Object construct()
   {
     try
     {
@@ -1100,10 +1096,6 @@ public class MultiComparator extends JFrame
              "read failed due to an IO error: " +
              e.getMessage());
     }
-        return null;
-      }
-    };
-    entryWorker.start();
   }
 
   /**