*: rename ATTRIBUTE_XXX to just XXX.

diff --git a/miscutils/crontab.c b/miscutils/crontab.c
index dc3179d..64ea4e6 100644
--- a/miscutils/crontab.c
+++ b/miscutils/crontab.c
@@ -85,7 +85,7 @@
 }
 
 int crontab_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int crontab_main(int argc ATTRIBUTE_UNUSED, char **argv)
+int crontab_main(int argc UNUSED_PARAM, char **argv)
 {
 	const struct passwd *pas;
 	const char *crontab_dir = CRONTABS;