ext4: remove dead code in updating backup sb

ext4_update_backup_sb checks for err having some value
after unlocking buffer. But err has not been updated
till that point in any code which will lead execution
of the code in question.

Signed-off-by: Tanmay Bhushan <007047221b@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20221230141858.3828-1-007047221b@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

Author: tanmaybhushan

fs/ext4/ioctl.c

@@ -155,9 +155,6 @@ static int ext4_update_backup_sb(struct super_block *sb,
 	set_buffer_uptodate(bh);
 	unlock_buffer(bh);
 
-	if (err)
-		goto out_bh;
-
 	if (handle) {
 		err = ext4_handle_dirty_metadata(handle, NULL, bh);
 		if (err)