*: rename ATTRIBUTE_XXX to just XXX.

diff --git a/findutils/grep.c b/findutils/grep.c
index 8d18f43..5cfd772 100644
--- a/findutils/grep.c
+++ b/findutils/grep.c
@@ -371,9 +371,9 @@
 }
 
 static int FAST_FUNC file_action_grep(const char *filename,
-			struct stat *statbuf ATTRIBUTE_UNUSED,
+			struct stat *statbuf UNUSED_PARAM,
 			void* matched,
-			int depth ATTRIBUTE_UNUSED)
+			int depth UNUSED_PARAM)
 {
 	FILE *file = fopen(filename, "r");
 	if (file == NULL) {