[PL] Remove local_xs from CoupledSolsForStagg.

ProcessLib/CoupledSolutionsForStaggeredScheme.h

@@ -49,17 +49,13 @@ struct CoupledSolutionsForStaggeredScheme
  */
 struct LocalCoupledSolutions
 {
-    LocalCoupledSolutions(std::vector<double>&& local_coupled_xs0_,
-                          std::vector<double>&& local_coupled_xs_)
-        : local_coupled_xs0(std::move(local_coupled_xs0_)),
-          local_coupled_xs(std::move(local_coupled_xs_))
+    LocalCoupledSolutions(std::vector<double>&& local_coupled_xs0_)
+        : local_coupled_xs0(std::move(local_coupled_xs0_))
     {
     }
 
     /// Local solutions of the previous time step.
     std::vector<double> const local_coupled_xs0;
-    /// Local solutions of the current time step.
-    std::vector<double> const local_coupled_xs;
 };
 
 /**

ProcessLib/VectorMatrixAssembler.cpp

@@ -70,12 +70,14 @@ void VectorMatrixAssembler::assemble(
     {
         auto local_coupled_xs0 = getCoupledLocalSolutions(cpl_xs->coupled_xs_t0,
                                                           indices_of_processes);
+
         auto local_coupled_xs =
             getCoupledLocalSolutions(x, indices_of_processes);
 
         auto const local_x = MathLib::toVector(local_coupled_xs);
+
         ProcessLib::LocalCoupledSolutions local_coupled_solutions(
-            std::move(local_coupled_xs0), std::move(local_coupled_xs));
+            std::move(local_coupled_xs0));
 
         local_assembler.assembleForStaggeredScheme(
             t, dt, local_x, process_id, _local_M_data, _local_K_data,
@@ -139,13 +141,14 @@ void VectorMatrixAssembler::assembleWithJacobian(
     {
         auto local_coupled_xs0 = getCoupledLocalSolutions(cpl_xs->coupled_xs_t0,
                                                           indices_of_processes);
+
         auto local_coupled_xs =
             getCoupledLocalSolutions(x, indices_of_processes);
 
         auto const local_x = MathLib::toVector(local_coupled_xs);
 
         ProcessLib::LocalCoupledSolutions local_coupled_solutions(
-            std::move(local_coupled_xs0), std::move(local_coupled_xs));
+            std::move(local_coupled_xs0));
 
         _jacobian_assembler->assembleWithJacobianForStaggeredScheme(
             local_assembler, t, dt, local_x, local_xdot, dxdot_dx, dx_dx,