netpoll: Eliminate redundant assignment

The assignment of zero to udph->check is unnecessary as it is
immediately overwritten in the subsequent line. Remove the redundant
assignment.

Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Joe Damato <jdamato@fastly.com>
Link: https://patch.msgid.link/20250319-netpoll_nit-v1-1-a7faac5cbd92@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: leitao

net/core/netpoll.c

@@ -433,7 +433,6 @@ int netpoll_send_udp(struct netpoll *np, const char *msg, int len)
 	udph->len = htons(udp_len);
 
 	if (np->ipv6) {
-		udph->check = 0;
 		udph->check = csum_ipv6_magic(&np->local_ip.in6,
 					      &np->remote_ip.in6,
 					      udp_len, IPPROTO_UDP,