[bugfix] Remove bogus typename outside of template.

It is not needed here and does not compile with g++-4.4

dune/istl/paamg/test/pthreadamgtest.cc

@@ -68,7 +68,7 @@ typedef Dune::BlockVector<VectorBlock> Vector;
 typedef Dune::MatrixAdapter<BCRSMat,Vector,Vector> Operator;
 typedef Dune::CollectiveCommunication<void*> Comm;
 typedef Dune::SeqSSOR<BCRSMat,Vector,Vector> Smoother;
-typedef typename Dune::Amg::SmootherTraits<Smoother>::Arguments SmootherArgs;
+typedef Dune::Amg::SmootherTraits<Smoother>::Arguments SmootherArgs;
 
 struct thread_arg
 {