do not pass the version to dns_db_createiterator()

lib/dns/db.c

@@ -310,8 +310,7 @@ dns_db_printnode(dns_db_t *db, dns_dbnode_t *node, FILE *out) {
  ***/
 
 dns_result_t
-dns_db_createiterator(dns_db_t *db, dns_dbversion_t *version,
-		      isc_boolean_t relative_names,
+dns_db_createiterator(dns_db_t *db, isc_boolean_t relative_names,
 		      dns_dbiterator_t **iteratorp)
 {
 	/*
@@ -321,8 +320,7 @@ dns_db_createiterator(dns_db_t *db, dns_dbversion_t *version,
 	REQUIRE(DNS_DB_VALID(db));
 	REQUIRE(iteratorp != NULL && *iteratorp == NULL);
 
-	return (db->methods->createiterator(db, version, relative_names,
-					    iteratorp));
+	return (db->methods->createiterator(db, relative_names, iteratorp));
 }
 
 /***

lib/dns/include/dns/db.h

@@ -98,7 +98,6 @@ typedef struct dns_dbmethods {
 	void		(*printnode)(dns_db_t *db, dns_dbnode_t *node,
 				     FILE *out);
 	dns_result_t 	(*createiterator)(dns_db_t *db,
-					  dns_dbversion_t *version,
 					  isc_boolean_t relative_names,
 					  dns_dbiterator_t **iteratorp);
 	dns_result_t	(*findrdataset)(dns_db_t *db, dns_dbnode_t *node,
@@ -604,19 +603,13 @@ dns_db_printnode(dns_db_t *db, dns_dbnode_t *node, FILE *out);
  ***/
 
 dns_result_t
-dns_db_createiterator(dns_db_t *db, dns_dbversion_t *version,
-		      isc_boolean_t relative_names,
+dns_db_createiterator(dns_db_t *db, isc_boolean_t relative_names,
 		      dns_dbiterator_t **iteratorp);
 /*
  * Create an iterator for version 'version' of 'db'.
  *
  * Notes:
  *
- *	If 'version' is NULL, then the current version will be used.
- *
- *	If a non-NULL version is specified, the iterator will create its
- *	own reference to it, so the caller need not keep its reference open.
- *
  *	If 'relative_names' is ISC_TRUE, then node names returned by the
  *	iterator will be relative to the iterator's current origin.  If
  *	ISC_FALSE, then the node names will be absolute.
@@ -625,8 +618,6 @@ dns_db_createiterator(dns_db_t *db, dns_dbversion_t *version,
  *
  *	'db' is a valid database.
  *
- *	version == NULL, or is a valid read-only version.
- *
  *	iteratorp != NULL && *iteratorp == NULL
  *
  * Ensures: