Price::deleteAction

public function deleteAction(int $id): ?bool
{
	$r = $this->exists($id);
	if ($r->isSuccess())
	{
		$r = $this->deleteValidate($id);
		if ($r->isSuccess())
		{
			$r = BitrixCatalogModelPrice::delete($id);
		}
	}

	if (!$r->isSuccess())
	{
		$this->addErrors($r->getErrors());

		return null;
	}

	return true;
}