Resolved conflicting typedefs.

[[Imported from SVN: r3282]]

istl/communicator.hh

@@ -143,11 +143,6 @@ namespace Dune
      */
     typedef typename RemoteIndices::LocalIndex LocalIndex;
 
-    /**
-     * @brief  The type of the index set we use.
-     */
-    typedef typename RemoteIndices::ParallelIndexSet ParallelIndexSet;
-
     /**
      * @brief Creates a new DatatypeCommunicator.
      * @param remote The remote index set to use.