Fix warnings in new example

Author: jwpeterson

examples/transient/transient_ex3/claw_system.C

@@ -55,7 +55,7 @@ ClawSystem::ClawSystem (EquationSystems & es,
 
   // Allocate SparseMatrices. I could not figure out how to do
   // this in the initialization list, I don't think it's possible.
-  for (auto i : make_range(2))
+  for (unsigned int i=0; i<2; ++i)
   {
     _advection_matrices.push_back(SparseMatrix<Number>::build(es.comm()));
     _avg_matrices.push_back(SparseMatrix<Number>::build(es.comm()));
@@ -622,7 +622,6 @@ void ClawSystem::assemble_jump_coupling_matrix()
   // Data for surface integrals on the element boundary
   const std::vector<std::vector<Real>> & phi_face = fe_elem_face->get_phi();
   const std::vector<Real> & JxW_face = fe_elem_face->get_JxW();
-  const std::vector<Point> & qface_normals = fe_elem_face->get_normals();
   const std::vector<Point> & qface_points = fe_elem_face->get_xyz();
 
   // Data for surface integrals on the neighbor boundary

examples/transient/transient_ex3/transient_ex3.C

@@ -80,7 +80,6 @@ int main (int argc, char** argv)
   // Read mesh options from the input file
   GetPot infile(parameters_filename);
   unsigned int n_elem = infile("n_elem", 1);       // Determines the number of elements in the "truth" mesh
-  const unsigned int dim = 2;                      // The number of spatial dimensions
 
   // Build a mesh
   Mesh mesh (init.comm());