Adapt code to interface change

In e01898cc the template paramter V was removed. This commit updates the
AcceleratedNonlinearGSStep accordingly.

dune/tnnmg/iterationsteps/acceleratednonlineargsstep.hh

@@ -36,7 +36,7 @@ public:
   using Functional = F;
 
   using LocalSolver = LS;
-  using NonlinearSmoother = NonlinearGSStep<Vector, Functional, LocalSolver, BitVector>;
+  using NonlinearSmoother = NonlinearGSStep<Functional, LocalSolver, BitVector>;
 
   using AccelerationStep = A;
 

dune/tnnmg/test/nonlineargsperformancetest.cc

@@ -79,7 +79,7 @@ void performanceTest(const MatrixType& mat, VectorType& x, const VectorType& rhs
             gaussSeidelLoop(xi, restriction, ignoreI, scalarLocalSolver);
         };
 
-        using Step = typename Dune::TNNMG::NonlinearGSStep<Vector, Functional, decltype(localSolver)>;
+        using Step = typename Dune::TNNMG::NonlinearGSStep<Functional, decltype(localSolver)>;
         using Solver = LoopSolver<Vector>;
         using Norm =  EnergyNorm<Matrix, Vector>;
 
@@ -113,7 +113,7 @@ void performanceTest(const MatrixType& mat, VectorType& x, const VectorType& rhs
             gaussSeidelLoop(xi, restriction, ignoreI, scalarLocalSolver);
         };
 
-        using Step = typename Dune::TNNMG::NonlinearGSStep<Vector, Functional, decltype(localSolver)>;
+        using Step = typename Dune::TNNMG::NonlinearGSStep<Functional, decltype(localSolver)>;
         using Solver = LoopSolver<Vector>;
         using Norm =  EnergyNorm<Matrix, Vector>;