ipv4: Kill fib_semantic_match declaration from fib_lookup.h

This function no longer exists.
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/fib_lookup.h

@@ -25,9 +25,6 @@ static inline void fib_alias_accessed(struct fib_alias *fa)
 }
 
 /* Exported by fib_semantics.c */
-extern int fib_semantic_match(struct fib_table *tb, struct list_head *head,
-			      const struct flowi *flp,
-			      struct fib_result *res, int prefixlen, int fib_flags);
 extern void fib_release_info(struct fib_info *);
 extern struct fib_info *fib_create_info(struct fib_config *cfg);
 extern int fib_nh_match(struct fib_config *cfg, struct fib_info *fi);