don't include dune traits for Evaluation

unused and it creates an unnecessary dune-common dependency
now test_EvaluationFormat no longer depends on dune-common

opm/material/densead/Evaluation.hpp

@@ -614,22 +614,6 @@ std::ostream& operator<<(std::ostream& os, const Evaluation<ValueType, numVars,
 } // namespace DenseAd
 } // namespace Opm
 
-// this makes the Dune matrix/vector classes happy...
-#include <dune/common/ftraits.hh>
-
-namespace Dune {
-template <class ValueType, int numVars, unsigned staticSize>
-struct FieldTraits<Opm::DenseAd::Evaluation<ValueType, numVars, staticSize> >
-{
-public:
-    typedef Opm::DenseAd::Evaluation<ValueType, numVars, staticSize> field_type;
-    // setting real_type to field_type here potentially leads to slightly worse
-    // performance, but at least it makes things compile.
-    typedef field_type real_type;
-};
-
-} // namespace Dune
-
 #include "EvaluationSpecializations.hpp"
 
 #endif // OPM_DENSEAD_EVALUATION_HPP

opm/material/eos/PengRobinson.hpp

@@ -37,6 +37,7 @@
 #include <opm/material/common/PolynomialUtils.hpp>
 
 #include <csignal>
+#include <sstream>
 
 namespace Opm {