nexthop: remove redundant assignment to err

The variable err is initialized with a value that is never read
and err is reassigned a few statements later. This initialization
is redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Reviewed-by: NDavid Ahern <dsahern@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/nexthop.c

@@ -836,7 +836,7 @@ static int nh_create_ipv6(struct net *net,  struct nexthop *nh,
 		.fc_encap = cfg->nh_encap,
 		.fc_encap_type = cfg->nh_encap_type,
 	};
-	int err = -EINVAL;
+	int err;
 
 	if (!ipv6_addr_any(&cfg->gw.ipv6))
 		fib6_cfg.fc_flags |= RTF_GATEWAY;