*: rename ATTRIBUTE_XXX to just XXX.

diff --git a/coreutils/du.c b/coreutils/du.c
index b469824..efc9bb9 100644
--- a/coreutils/du.c
+++ b/coreutils/du.c
@@ -141,7 +141,7 @@
 }
 
 int du_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int du_main(int argc ATTRIBUTE_UNUSED, char **argv)
+int du_main(int argc UNUSED_PARAM, char **argv)
 {
 	unsigned long total;
 	int slink_depth_save;