1. Create InstallData.php at the following path and paste the below code.

appcodeMagemonkeysRemoveAttributeSetupInstallData.php

<?php
 namespace MagemonkeysRemoveAttributeSetup;

 use MagentoEavSetupEavSetup;
 use MagentoEavSetupEavSetupFactory;
 use MagentoFrameworkSetupInstallDataInterface;
 use MagentoFrameworkSetupModuleContextInterface;
 use MagentoFrameworkSetupModuleDataSetupInterface;

class InstallData implements InstallDataInterface
 {
     private $eavSetupFactory;

     public function __construct(EavSetupFactory $eavSetupFactory) 
     {
         $this->eavSetupFactory = $eavSetupFactory;
     }
 
     public function install(ModuleDataSetupInterface $setup, ModuleContextInterface $context)
     {
         $eavSetup = $this->eavSetupFactory->create(['setup' => $setup]);
         $eavSetup->removeAttribute(MagentoCatalogModelProduct::ENTITY,
         'custom_attribute_id');
     }
 } ?>

2. Refresh the cache and deploy the static content command.

php bin/magento setup:upgrade

php bin/magento setup:static-content:deploy -f

php bin/magento cache:flush