xfrm: remove unused struct xfrm_policy::next

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index f2c5ba2..45e11b3 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -467,7 +467,6 @@
 
 struct xfrm_policy
 {
-	struct xfrm_policy	*next;
 	struct hlist_node	bydst;
 	struct hlist_node	byidx;