tools/nolibc: drop unused variables

Nobody needs it, get rid of it.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Willy Tarreau <w@1wt.eu>

tools/include/nolibc/sys.h

@@ -738,7 +738,6 @@ static __attribute__((unused))
 int open(const char *path, int flags, ...)
 {
 	mode_t mode = 0;
-	int ret;
 
 	if (flags & O_CREAT) {
 		va_list args;