[PATCH] btrfs: remove set bu not used variable 'ret' and 'features'

[Jason Yan <yanaijie@xxxxxxxxxx>]

Fix the following gcc warning:

fs/btrfs/sysfs.c:1469:6: warning: variable 'ret' set but not used
[-Wunused-but-set-variable]
  int ret;
      ^~~
fs/btrfs/sysfs.c:1468:6: warning: variable 'features' set but not used
[-Wunused-but-set-variable]
  u64 features;
      ^~~~~~~~
Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Jason Yan <yanaijie@xxxxxxxxxx>
---
 fs/btrfs/sysfs.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index a39bff64ff24..eb1e0afa89d3 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -1465,13 +1465,10 @@ void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info,
 {
 	struct btrfs_fs_devices *fs_devs;
 	struct kobject *fsid_kobj;
-	u64 features;
-	int ret;
 
 	if (!fs_info)
 		return;
 
-	features = get_features(fs_info, set);
 	ASSERT(bit & supported_feature_masks[set]);
 
 	fs_devs = fs_info->fs_devices;
@@ -1485,7 +1482,7 @@ void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info,
 	 * to use sysfs_update_group but some refactoring is needed first.
 	 */
 	sysfs_remove_group(fsid_kobj, &btrfs_feature_attr_group);
-	ret = sysfs_create_group(fsid_kobj, &btrfs_feature_attr_group);
+	sysfs_create_group(fsid_kobj, &btrfs_feature_attr_group);
 }
 
 int __init btrfs_init_sysfs(void)
-- 
2.17.2