[Cleanup] No reason to have width/height configurable

Also do not assign a double to an integer

src/one-body-sample.cc

@@ -112,17 +112,16 @@ int main(int argc, char *argv[]) {
     // {{{ Set up grid
     using Grid = Dune::ALUGrid<dims, dims, Dune::simplex, Dune::nonconforming>;
 
-    Dune::FieldVector<typename Grid::ctype, dims> lowerLeft(0);
-    Dune::FieldVector<typename Grid::ctype, dims> upperRight(1);
-    upperRight[0] = parset.get<size_t>("body.width");
-    upperRight[1] = parset.get<size_t>("body.height");
+    Dune::FieldVector<size_t, dims> lowerLeft(0);
+    Dune::FieldVector<size_t, dims> upperRight(1);
+    upperRight[0] = 5;
+    upperRight[1] = 1;
 
     std::shared_ptr<Grid> grid;
     {
       Dune::array<unsigned int, dims> elements;
-      std::fill(elements.begin(), elements.end(), 1);
-      elements[0] = parset.get<size_t>("body.width");
-      elements[1] = parset.get<size_t>("body.height");
+      for (size_t i = 0; i < dims; ++i)
+        elements[i] = upperRight[i]; // 1x1 elements
 
       grid = Dune::StructuredGridFactory<Grid>::createSimplexGrid(
           lowerLeft, upperRight, elements);

src/one-body-sample.parset

@@ -10,8 +10,6 @@ finalTime = 15
 youngModulus = 5e7
 poissonRatio = 0.3 # The closer we get to 0.5, the more wiggly everything gets
 density = 5000
-height  = 1
-width   = 5
 shearViscosity = 0
 bulkViscosity  = 0