How can I empty Magento 2 cart programmatically
You will need to remove the Magento items one by one from Magento cart.
$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$checkoutSession = $objectManager->get('Magento\Checkout\Model\Session');
$allItems = $checkoutSession->getQuote()->getAllVisibleItems();
$cart = $objectManager->get('Magento\Checkout\Model\Cart');
if(count($allItems) > 0){
foreach ($allItems as $item) {
$itemId = $item->getItemId();//item id of particular item
$cart->removeItem($itemId)->save();
}
}