Remove redundant 'using' statement

[[Imported from SVN: r8556]]

test/targetspacetest.cc

@@ -6,15 +6,13 @@
 
 #include "valuefactory.hh"
 
-using Dune::FieldVector;
+using namespace Dune;
 
 
 /** \file
     \brief Unit tests for classes that implement value manifolds for geodesic FE functions
 */
 
-using namespace Dune;
-
 /** \brief Computes the diameter of a set */
 template <class TargetSpace>
 double diameter(const std::vector<TargetSpace>& v)