*: rename ATTRIBUTE_XXX to just XXX.

diff --git a/miscutils/chrt.c b/miscutils/chrt.c
index a0f684b..23ef58c 100644
--- a/miscutils/chrt.c
+++ b/miscutils/chrt.c
@@ -41,7 +41,7 @@
 #define OPT_o (1<<4)
 
 int chrt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int chrt_main(int argc ATTRIBUTE_UNUSED, char **argv)
+int chrt_main(int argc UNUSED_PARAM, char **argv)
 {
 	pid_t pid = 0;
 	unsigned opt;