The variable parent_level isn't used, so don't bother to get it.

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/ctree.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 32a57a70b98d..e5a0941c4bde 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -1578,13 +1578,10 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans,
 	int end_slot;
 	int i;
 	int err = 0;
-	int parent_level;
 	u32 blocksize;
 	int progress_passed = 0;
 	struct btrfs_disk_key disk_key;
 
-	parent_level = btrfs_header_level(parent);
-
 	WARN_ON(trans->transaction != fs_info->running_transaction);
 	WARN_ON(trans->transid != fs_info->generation);
 
-- 
2.29.GIT