function deleteTags($blog_id, $tag_group)
{
/** @var $wpdb \wpdb */
global $wpdb;
$result = $wpdb->delete($this->dbLinkTable, array('users_id' => $this->userId, 'blogs_id' => $blog_id, 'tags_group' => $tag_group), array('%d', '%d', '%d'));
// TODO:
// $wpdb->query( "OPTIMIZE TABLE {$this->dbLinkTable} " );
return $result;
}