can: remove some pointless conditionals before kfree_skb()

Remove some pointless conditionals before kfree_skb().
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/can/af_can.c

@@ -273,8 +273,7 @@ int can_send(struct sk_buff *skb, int loop)
 		err = net_xmit_errno(err);
 
 	if (err) {
-		if (newskb)
-			kfree_skb(newskb);
+		kfree_skb(newskb);
 		return err;
 	}