lithium\storage\session\strategy\Hmac::delete PHP Method

    public function delete($data, array $options = array())
    {
        $class = $options['class'];
        $futureData = $class::read(null, array('strategies' => false));
        unset($futureData[$options['key']]);
        $signature = static::_signature($futureData);
        $class::write('__signature', $signature, array('strategies' => false) + $options);
        return $data;
    }