cipso: Remove unused inline functions

They are not used any more since commit b1edeb10 ("netlabel: Replace
protocol/NetLabel linking with refrerence counts")
Signed-off-by: NYueHaibing <yuehaibing@huawei.com>
Acked-by: NPaul Moore <paul@paul-moore.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/net/cipso_ipv4.h

@@ -150,18 +150,6 @@ static inline int cipso_v4_doi_walk(u32 *skip_cnt,
 {
 	return 0;
 }
-
-static inline int cipso_v4_doi_domhsh_add(struct cipso_v4_doi *doi_def,
-					  const char *domain)
-{
-	return -ENOSYS;
-}
-
-static inline int cipso_v4_doi_domhsh_remove(struct cipso_v4_doi *doi_def,
-					     const char *domain)
-{
-	return 0;
-}
 #endif /* CONFIG_NETLABEL */
 
 /*