Revision dc3015b3-e854-40f2-b5a8-bd3337579263

If you don't know how to create module, use the [link][1], then use my code below


  [1]: https://www.mageplaza.com/magento-2-module-development/

Create `index.php` in `VendorName/ModuleName/Block/CustomerAccount` 

    <?php
    
      namespace VendorName\ModuleName\Block\CustomerAccount;

       use Magento\Checkout\Model\Cart as CustomerCart;
      
      class Index extends \Magento\Framework\View\Element\Template
       {
         
       protected $checkoutSession;

       protected $cart;

        protected $_urlInterface;
    
        public function __construct(
                \Magento\Backend\Block\Widget\Context $context,
                \Magento\Framework\UrlInterface $urlInterface,
                 \Magento\Checkout\Model\Session $checkoutSession,
                  CustomerCart $cart,
                 array $data = [])
        {
            $this->checkoutSession = $checkoutSession;
            $this->cart = $cart;
            $this->_urlInterface = $urlInterface;
            parent::__construct($context, $data);
          }
     
        public function getCurrUrl()
         {

           return $this->_urlInterface->getCurrentUrl();

         } 
        
        
        public function removeActiveCart(){

          $allItems = $this->checkoutSession->getQuote()->getAllVisibleItems();

          foreach ($allItems as $item) {
            $itemId = $item->getItemId();
            $this->cart->removeItem($itemId)->save();
         }

        }
    }


Create `default.xml` in VendorName/ModuleName/view/frontend/layout

    <?xml version="1.0"?>
    <page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
        <body>
            <referenceBlock name="customer_account_navigation">
                <block class="VendorName\ModuleName\Block\CustomerAccount\Index" name="customer_account" template="VendorName_ModuleName::removecart.phtml" />
            </referenceBlock>
        </body>
    </page>

Create `removecart.phtml` in VendorName/ModuleName/view/frontend/templates

    <?php 
        $currentUrl= $this->getCurrUrl();

         if(isset( $_POST['remove']) AND $_POST['remove']=='true'){
           $this->removeActiveCart();
        }
    ?>

    <form action="<?php echo $currentUrl; ?>" method="POST" id="removecart">
        <fieldset>
            <input type='hidden' name='remove' value="true">
        </fieldset>
        <button type="submit"><?php echo __("Remove Active Cart");?></button>
    </form>