Dont copy remarks to invoice

functions.php

 <?php
/**
 * @snippet       WooCommerce - Fortnox plugin by Redlight Media - Dont copy remarks
 * @author        Redlight Media AB / Christopher Hedqvist
 * @compatible    WooCommerce 3.2.5
 */
function redlight_fortnox_dont_copy_remarks( $orderData, $order_id) {
    $orderData['Order']['CopyRemarks'] = false;
    return $orderData;
}
add_filter('obj_fortnox_order_data', 'redlight_fortnox_dont_copy_remarks', 20, 2 );