message: Removed block superlu constructor declaration
diff: #ifdef MFEM_USE_SUPERLU
  #ifdef MFEM_USE_MPI
  -#include "blockoperator.hpp"
  #include "operator.hpp"
  #include "hypre.hpp"
  @@ -57,8 +56,6 @@ public:
  format. All data is copied so the original matrix may be deleted. */
  SuperLURowLocMatrix(const HypreParMatrix & hypParMat);
  - SuperLURowLocMatrix(const BlockOperator &ops);
  -
  ~SuperLURowLocMatrix();
  void Mult(const Vector &x, Vector &y) const
  