Do not use old UFL file for opcount test

test/sumfact/poisson/CMakeLists.txt

@@ -13,7 +13,7 @@ dune_add_formcompiler_system_test(UFLFILE poisson_3d.ufl
 #================
 # Opcounter tests
 #================
-dune_add_formcompiler_system_test(UFLFILE opcount_poisson_2d_order2.ufl
+dune_add_formcompiler_system_test(UFLFILE poisson_2d.ufl
                                   BASENAME opcount_sumfact_poisson_2d_order2
                                   INIFILE opcount_poisson_2d_order2.mini
                                   )

test/sumfact/poisson/opcount_poisson_2d_order2.ufl

-cell = "quadrilateral"
-
-f = Expression("Dune::FieldVector<oc::OpCounter<double>,2> c(0.5); c-= x; return 4.*(1.-c.two_norm2())*exp(-1.*c.two_norm2());", cell=cell)
-g = Expression("Dune::FieldVector<oc::OpCounter<double>,2> c(0.5); c-= x; return exp(-1.*c.two_norm2());", cell=cell)
-
-V = FiniteElement("CG", cell, 2, dirichlet_expression=g)
-u = TrialFunction(V)
-v = TestFunction(V)
-
-forms = [(inner(grad(u), grad(v)) - f*v)*dx]