Block::unlink

public function unlink()
{
	if ($this->access < $this::ACCESS_X)
	{
		$this->error->addError(
			'ACCESS_DENIED',
			Loc::getMessage('LANDING_BLOCK_ACCESS_DENIED')
		);
		return false;
	}

	$manifest = $this->getManifest();
	$res = self::parentDelete($this->id);
	if (!$res->isSuccess())
	{
		$this->error->addFromResult($res);
	}
	return $res->isSuccess();
}