ipv6: remove duplicated 'net/lwtunnel.h' include

Remove all but the first include of net/lwtunnel.h from seg6_iptunnel.c.

Reported-by: Zeal Robot <[email protected]>
Signed-off-by: Lv Ruyi <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: Lv Ruyi

net/ipv6/seg6_iptunnel.c

@@ -26,7 +26,6 @@
 #ifdef CONFIG_IPV6_SEG6_HMAC
 #include <net/seg6_hmac.h>
 #endif
-#include <net/lwtunnel.h>
 #include <linux/netfilter.h>
 
 static size_t seg6_lwt_headroom(struct seg6_iptunnel_encap *tuninfo)