Exclude discounted checkouts from PMPro Affiliate tracking

my_pmpro_affiliates_skip_discounted_checkouts.php

<?php 
/**
 * Exclude discounted membership checkouts from PMPro Affiliate tracking
 * 
 * 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_affiliates_skip_discounted_checkouts( $order ){

	if( ! function_exists( 'pmpro_affiliates_pmpro_added_order' ) ) {
		return;
	}

	$pmpro_level = $order->getMembershipLevel();
	
	if ( isset( $pmpro_level->code_id ) ) {
		remove_action( 'pmpro_added_order', 'pmpro_affiliates_pmpro_added_order' );
		remove_action( 'pmpro_after_checkout', 'pmpro_affiliates_no_order_checkout' );
	}
		
}
add_action( 'pmpro_added_order', 'my_pmpro_affiliates_skip_discounted_checkouts', 5 );