Get rid of include directives inside namespace blocks (bug #339).

unsupported/Eigen/MatrixFunctions

@@ -34,8 +34,6 @@
 #include <Eigen/LU>
 #include <Eigen/Eigenvalues>
 
-namespace Eigen {
-
 /** \ingroup Unsupported_modules
   * \defgroup MatrixFunctions_Module Matrix functions module
   * \brief This module aims to provide various methods for the computation of
@@ -393,7 +391,5 @@ Output: \verbinclude MatrixSquareRoot.out
 
 */
 
-}
-
 #endif // EIGEN_MATRIX_FUNCTIONS