Removed useless check for the CUSP library

It is not used in current code, it was used only in some legacy benchmarks.

CMakeLists.txt

@@ -161,20 +161,6 @@ if( WITH_CUDA STREQUAL "yes" )
         # TODO: this is necessary only due to a bug in cmake
         set( CUDA_ADD_LIBRARY_OPTIONS -shared )
 
-        ####
-        # Check for CUSP
-        #
-        find_path( CUSP_INCLUDE_DIR cusp/hyb_matrix.h  
-                   DOC "CUSP headers." )
-        if( ${CUSP_INCLUDE_DIR} STREQUAL "CUSP_INCLUDE_DIR-NOTFOUND" )
-            message( "CUSP not found." )
-            set( HAVE_CUSP "//#define HAVE_CUSP 1" )
-        else()      
-            message( "CUSP found. -- ${CUSP_INCLUDE_DIR}" )
-            set( HAVE_CUSP "#define HAVE_CUSP 1" )
-            cuda_include_directories( ${CUSP_INCLUDE_DIR} )
-        endif()
-        
         ####
         # Check for CUSPARSE
         #

tnlConfig.h.in

@@ -5,8 +5,6 @@
 @HAVE_SYS_IOCTL_H@
 
 #ifdef HAVE_CUDA
-    @HAVE_CUSP@
-
     @HAVE_CUSPARSE@
 #endif