message: Remove lin_solver verify
diff: @@ -681,7 +681,6 @@ int main(int argc, char *argv[])
  // here we setup the linear solver for the system's Jacobian.
  Solver *S = NULL;
  const double linsol_rtol = 1e-12;
  - MFEM_VERIFY(!pa || lin_solver == 1, "");
  if (lin_solver == 0)
  {
  S = new DSmoother(1, 1.0, max_lin_iter);
  