src/core/perfmodel/perfmodel_bus.c: revert commit #3686. Users should see this message

src/core/perfmodel/perfmodel_bus.c

@@ -425,10 +425,8 @@ static void benchmark_all_gpu_devices(void)
 		STARPU_ABORT();
 	}
 #else
-#ifdef STARPU_DEVEL
 #warning Missing binding support, StarPU will not be able to properly benchmark NUMA topology
 #endif
-#endif
 
 	struct starpu_machine_config_s *config = _starpu_get_machine_config();
 	ncpus = _starpu_topology_get_nhwcpu(config);