tipc: Eliminate message header routines for caching destination node

Gets rid of a pair of routines that provide support for temporarily
caching the destination node for a message in the associated message
buffer's application handle, since this capability is no longer used.
Signed-off-by: NAllan Stephens <allan.stephens@windriver.com>
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

net/tipc/msg.h

@@ -310,26 +310,6 @@ static inline void msg_set_seqno(struct tipc_msg *m, u32 n)
 	msg_set_bits(m, 2, 0, 0xffff, n);
 }
 
-/*
- * TIPC may utilize the "link ack #" and "link seq #" fields of a short
- * message header to hold the destination node for the message, since the
- * normal "dest node" field isn't present.  This cache is only referenced
- * when required, so populating the cache of a longer message header is
- * harmless (as long as the header has the two link sequence fields present).
- *
- * Note: Host byte order is OK here, since the info never goes off-card.
- */
-
-static inline u32 msg_destnode_cache(struct tipc_msg *m)
-{
-	return m->hdr[2];
-}
-
-static inline void msg_set_destnode_cache(struct tipc_msg *m, u32 dnode)
-{
-	m->hdr[2] = dnode;
-}
-
 /*
  * Words 3-10
  */