*: rename ATTRIBUTE_XXX to just XXX.

diff --git a/coreutils/usleep.c b/coreutils/usleep.c
index d34880d..e7acd5f 100644
--- a/coreutils/usleep.c
+++ b/coreutils/usleep.c
@@ -14,7 +14,7 @@
 /* This is a NOFORK applet. Be very careful! */
 
 int usleep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int usleep_main(int argc ATTRIBUTE_UNUSED, char **argv)
+int usleep_main(int argc UNUSED_PARAM, char **argv)
 {
 	if (!argv[1]) {
 		bb_show_usage();