f2fs: remove unnecessary condition judgment

Remove the unnecessary condition judgment, because
'max_slots' has been initialized to '0' at the beginging
of the function, as following:
if (max_slots)
       *max_slots = 0;
Signed-off-by: Yuan Zhong <yuan.mark.zhong@samsung.com>
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/dir.c

@@ -139,7 +139,7 @@ struct f2fs_dir_entry *find_target_dentry(struct qstr *name, int *max_slots,
 			!memcmp(d->filename[bit_pos], name->name, name->len))
 			goto found;
 
-		if (max_slots && *max_slots >= 0 && max_len > *max_slots) {
+		if (max_slots && max_len > *max_slots) {
 			*max_slots = max_len;
 			max_len = 0;
 		}