Remove new_link argument usage, we don't need it anymore

plugins/password/drivers/sql.php

@@ -35,15 +35,8 @@ class rcube_sql_password
         }
 
         if ($dsn = $rcmail->config->get('password_db_dsn')) {
-            // #1486067: enable new_link option
-            if (is_array($dsn) && empty($dsn['new_link']))
-                $dsn['new_link'] = true;
-            else if (!is_array($dsn) && !preg_match('/\?new_link=true/', $dsn))
-                $dsn .= '?new_link=true';
-
             $db = rcube_db::factory($dsn, '', false);
             $db->set_debug((bool)$rcmail->config->get('sql_debug'));
-            $db->db_connect('w');
         }
         else {
             $db = $rcmail->get_dbh();