iscsi_target: Remove redundant null check before kfree

kfree on null pointer is a no-op.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

drivers/target/iscsi/iscsi_target_login.c

@@ -1118,9 +1118,7 @@ static int __iscsi_target_login_thread(struct iscsi_np *np)
 		idr_remove(&sess_idr, conn->sess->session_index);
 		spin_unlock_bh(&sess_idr_lock);
 	}
-	if (conn->sess->sess_ops)
 	kfree(conn->sess->sess_ops);
-	if (conn->sess)
 	kfree(conn->sess);
 old_sess_out:
 	iscsi_stop_login_thread_timer(np);