src/core/perfmodel/perfmodel_print.c: remove unused variable

src/core/perfmodel/perfmodel_print.c

@@ -232,7 +232,6 @@ int starpu_perfmodel_print_all(struct starpu_perfmodel *model, char *arch, char
 
 		if (strcmp(arch, "cuda") == 0)
 		{
-			unsigned devid;
 			int implid;
 			struct starpu_perfmodel_arch perf_arch;