[cleanup][Fluxes] remove typedef Traits in private section since it's

not used.

dune/fem-dg/operator/fluxes/advection/fluxbase.hh

@@ -22,8 +22,6 @@ namespace Fem
   template <class ModelImp, class FluxParameterImp >
   class DGAdvectionFluxBase
   {
-    typedef typename ModelImp::Traits            Traits;
-
     enum { dimRange = ModelImp::dimRange };
     typedef typename ModelImp::DomainType        DomainType;
     typedef typename ModelImp::RangeType         RangeType;

dune/fem-dg/operator/fluxes/advection/fluxes.hh

@@ -103,7 +103,6 @@ namespace Fem
     typedef DGAdvectionFluxBase< ModelImp, AdvectionFluxParameters  >
                                                   BaseType;
 
-    typedef typename ModelImp::Traits             Traits;
     enum { dimRange = ModelImp::dimRange };
     typedef typename ModelImp::DomainType         DomainType;
     typedef typename ModelImp::RangeType          RangeType;

dune/fem-dg/operator/fluxes/advection/upwindflux.hh

@@ -26,7 +26,6 @@ namespace Fem
     typedef DGAdvectionFluxBase< ModelImp, AdvectionFluxParameters >
                                                   BaseType;
 
-    typedef typename ModelImp::Traits             Traits;
     enum { dimRange = ModelImp::dimRange };
     typedef typename ModelImp::DomainType         DomainType;
     typedef typename ModelImp::RangeType          RangeType;

dune/fem-dg/operator/fluxes/euler/fluxes.hh

@@ -96,7 +96,6 @@ namespace Fem
   {
     typedef DGAdvectionFluxBase< ModelImp, AdvectionFluxParameters >   BaseType;
 
-    typedef typename ModelImp::Traits             Traits;
     enum { dimRange = ModelImp::dimRange };
     typedef typename ModelImp::DomainType         DomainType;
     typedef typename ModelImp::RangeType          RangeType;