[PATCH] btrfs: remove unused actions

[Alex Shi <alex.shi@linux.alibaba.com>]

Seems no one care ret and features in func btrfs_sysfs_feature_update,
so better to remove them.

Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com>
Cc: Chris Mason <clm@fb.com> 
Cc: Josef Bacik <josef@toxicpanda.com> 
Cc: David Sterba <dsterba@suse.com> 
Cc: linux-btrfs@vger.kernel.org 
Cc: linux-kernel@vger.kernel.org 
---
 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 5ebbe8a5ee76..93f870727aa7 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -1148,13 +1148,10 @@ 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;
@@ -1168,7 +1165,7 @@ 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)
-- 
1.8.3.1