Remove XSMM support from Tensor module

cmake/FindXsmm.cmake

@@ -1,25 +0,0 @@
-# libxsmm support.
-# libxsmm provides matrix multiplication kernels optimized for
-# the latest Intel architectures.
-# Download the library from https://github.com/hfp/libxsmm
-# Compile with make BLAS=0
-
-if (LIBXSMM)
-  set(XSMM_FIND_QUIETLY TRUE)
-  set(XSMM_INCLUDES ${LIBXSMM}/include)
-  set(XSMM_LIBRARIES ${LIBXSMM}/lib)
-endif (LIBXSMM)
-
-find_path(LIBXSMM 
-  NAMES 
-  libxsmm.h 
-  PATHS 
-  $ENV{XSMMDIR}/include 
-  ${INCLUDE_INSTALL_DIR} 
-)
-
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(XSMM DEFAULT_MSG
-                                  LIBXSMM)
-
-mark_as_advanced(LIBXSMM)