Removed dead code

unsupported/Eigen/CXX11/src/Tensor/TensorMap.h

diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorMap.h b/unsupported/Eigen/CXX11/src/Tensor/TensorMap.h
index 417717b..04849dd 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorMap.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorMap.h
@@ -12,9 +12,6 @@
 
 namespace Eigen {
 
-template<int InnerStrideAtCompileTime, int OuterStrideAtCompileTime> class Stride;
-
-
 /** \class TensorMap
   * \ingroup CXX11_Tensor_Module
   *