Btrfs: remove unused argument of btrfs_extend_item()

Argument 'trans' is not used in btrfs_extend_item().

Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
diff --git a/fs/btrfs/inode-item.c b/fs/btrfs/inode-item.c
index cb44398..1640e03 100644
--- a/fs/btrfs/inode-item.c
+++ b/fs/btrfs/inode-item.c
@@ -361,7 +361,7 @@
 						   name, name_len, NULL))
 			goto out;
 
-		btrfs_extend_item(trans, root, path, ins_len);
+		btrfs_extend_item(root, path, ins_len);
 		ret = 0;
 	}
 	if (ret < 0)
@@ -417,7 +417,7 @@
 			goto out;
 
 		old_size = btrfs_item_size_nr(path->nodes[0], path->slots[0]);
-		btrfs_extend_item(trans, root, path, ins_len);
+		btrfs_extend_item(root, path, ins_len);
 		ref = btrfs_item_ptr(path->nodes[0], path->slots[0],
 				     struct btrfs_inode_ref);
 		ref = (struct btrfs_inode_ref *)((unsigned long)ref + old_size);