Horde_Imap_Client_Fetch_Query::remove PHP Method

    public function remove($criteria, $key)
    {
        if (isset($this->_data[$criteria]) && is_array($this->_data[$criteria])) {
            unset($this->_data[$criteria][$key]);
            if (empty($this->_data[$criteria])) {
                unset($this->_data[$criteria]);
            }
        }
    }