[XFRM]: beet: minor cleanups

Remove unnecessary initialization/variable.

Signed-off-by: Patrick McHardy <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/ipv4/xfrm4_mode_beet.c

···
  */
 static int xfrm4_beet_output(struct xfrm_state *x, struct sk_buff *skb)
 {
-	struct iphdr *iph, *top_iph = NULL;
+	struct iphdr *iph, *top_iph;
 	int hdrlen, optlen;
 
 	iph = ip_hdr(skb);
···
 	struct iphdr *iph = ip_hdr(skb);
 	int phlen = 0;
 	int optlen = 0;
-	__u8 ph_nexthdr = 0, protocol = 0;
+	u8 ph_nexthdr = 0;
 	int err = -EINVAL;
-
-	protocol = iph->protocol;
 
 	if (unlikely(iph->protocol == IPPROTO_BEETPH)) {
 		struct ip_beet_phdr *ph;
···
 	iph->saddr = x->sel.saddr.a4;
 	if (ph_nexthdr)
 		iph->protocol = ph_nexthdr;
-	else
-		iph->protocol = protocol;
 	iph->check = 0;
 	iph->check = ip_fast_csum(skb_network_header(skb), iph->ihl);
 	err = 0;