remove unused variable 'lhs and rhs'

apps/benchmarks/CUDA_ComplexGeometryList/CUDA_ComplexGeometryList.h

@@ -100,15 +100,16 @@ namespace walberla {
         };
 
     template< typename Index_T >
-    bool operator==( const ListOnGpu<Index_T> & lhs, const ListOnGpu<Index_T> & rhs )
+    bool operator==( const ListOnGpu<Index_T> & /*lhs*/, const ListOnGpu<Index_T> & /*rhs*/ )
     {
+
         return false;
     }
 
         template< typename ListOnCPU, typename ListOnGPU >
         void copyToGpu( const ListOnCPU & src, ListOnGPU & dst )
         {
-            static_assert( std::is_same< typename ListOnCPU::index_t, typename ListOnGPU::index_t >::value, "" );
+            static_assert( std::is_same< typename ListOnCPU::index_t, typename ListOnGPU::index_t >::value, "Error in the type comparing of index_t" );
 
             typedef typename ListOnCPU::index_t index_t;
 
@@ -141,7 +142,7 @@ namespace walberla {
         template< typename ListOnGPU, typename ListOnCPU>
         void copyToCpu( const ListOnGPU & src, ListOnCPU & dst )
         {
-            static_assert( std::is_same< typename ListOnCPU::index_t, typename ListOnGPU::index_t >::value, "" );
+            static_assert( std::is_same< typename ListOnCPU::index_t, typename ListOnGPU::index_t >::value, "Error in the type comparing of index_t" );
 
             typedef typename ListOnCPU::index_t index_t;