Index: upgrade.php
===================================================================
--- upgrade.php	(revision 41589)
+++ upgrade.php	(working copy)
@@ -1591,11 +1591,10 @@
  * @ignore
  * @since 4.3.0
  *
- * @global int  $wp_current_db_version Current version.
  * @global wpdb $wpdb                  WordPress database abstraction object.
  */
 function upgrade_430_fix_comments() {
-	global $wp_current_db_version, $wpdb;
+	global $wpdb;
 
 	$content_length = $wpdb->get_col_length( $wpdb->comments, 'comment_content' );