[IPSEC]: Kill unused decap state structure

This patch removes the *_decap_state structures which were previously
used to share state between input/post_input.  This is no longer
needed.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index c7612f4..0d5529c 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -242,7 +242,6 @@
 
 extern void xfrm_state_delete_tunnel(struct xfrm_state *x);
 
-struct xfrm_decap_state;
 struct xfrm_type
 {
 	char			*description;
@@ -606,25 +605,11 @@
 
 extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
 
-/* Decapsulation state, used by the input to store data during
- * decapsulation procedure, to be used later (during the policy
- * check
- */
-struct xfrm_decap_state {
-	char	decap_data[20];
-	__u16	decap_type;
-};   
-
-struct sec_decap_state {
-	struct xfrm_state	*xvec;
-	struct xfrm_decap_state decap;
-};
-
 struct sec_path
 {
 	atomic_t		refcnt;
 	int			len;
-	struct sec_decap_state	x[XFRM_MAX_DEPTH];
+	struct xfrm_state	*xvec[XFRM_MAX_DEPTH];
 };
 
 static inline struct sec_path *