Update discount code uses, if found, when an order is deleted

my_pmpro_delete_order_update_discount_code_uses.php

<?php
/**
 * Update discount code uses when the order is deleted.
 *
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
function my_pmpro_delete_order_update_discount_code( $order_id, $order ) {
	$order->updateDiscountCode( null );
}
add_action( 'pmpro_delete_order', 'my_pmpro_delete_order_update_discount_code', 10, 2 );