* Remove unused field.

db/update9.8.3.sql

@@ -1,5 +1,4 @@
 ALTER TABLE `zt_release` ADD `marker` enum('0','1') NOT NULL default '0' AFTER `name`;
 ALTER TABLE `zt_doc` ADD `collector` text NOT NULL AFTER `views`;
-ALTER TABLE `zt_doc` ADD `visitedDate` datetime NOT NULL AFTER `editedDate`;
 ALTER TABLE `zt_doclib` ADD `collector` text NOT NULL AFTER `main`;
 ALTER TABLE `zt_module` ADD `collector` text NOT NULL AFTER `owner`;

db/zentao.sql

@@ -260,7 +260,6 @@ CREATE TABLE IF NOT EXISTS `zt_doc` (
   `addedDate` datetime NOT NULL,
   `editedBy` varchar(30) NOT NULL,
   `editedDate` datetime NOT NULL,
-  `visitedDate` datetime NOT NULL,
   `acl` varchar(10) NOT NULL DEFAULT 'open',
   `groups` varchar(255) NOT NULL,
   `users` text NOT NULL,