BasketItem::deleteAction

public function deleteAction(BitrixSaleBasketItem $basketItem)
{
	/** @var BitrixSaleBasket $basketCollection */
	$basketCollection = $basketItem->getCollection();
	$order = $basketCollection->getOrder();

	$r = $basketItem->delete();
	if($r->isSuccess())
		$r = $order->save();

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

	return $r->isSuccess();
}