net/core/skmsg: Delete an unnecessary check before the function call “consume_skb”

The consume_skb() function performs also input parameter validation.
Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/skmsg.c

@@ -190,8 +190,7 @@ static int __sk_msg_free(struct sock *sk, struct sk_msg *msg, u32 i,
 		sk_msg_check_to_free(msg, i, msg->sg.size);
 		sge = sk_msg_elem(msg, i);
 	}
-	if (msg->skb)
-		consume_skb(msg->skb);
+	consume_skb(msg->skb);
 	sk_msg_init(msg);
 	return freed;
 }