tree-wide: make hash_ops typesafe

src/basic/in-addr-util.h

@@ -69,6 +69,4 @@ static inline size_t FAMILY_ADDRESS_SIZE(int family) {
  * See also oss-fuzz#11344. */
 #define IN_ADDR_NULL ((union in_addr_union) { .in6 = {} })
 
-void in_addr_data_hash_func(const void *p, struct siphash *state);
-int in_addr_data_compare_func(const void *a, const void *b);
 extern const struct hash_ops in_addr_data_hash_ops;