btrfs: remove redundant check of btrfs_iget return value

'btrfs_iget()' can not return NULL, so this test can be removed.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
1 file changed