/*
 * Remove custom fields and download meta boxes on order details page
 */

add_action('add_meta_boxes', 'sc_remove_order_meta_boxes', 90);

function sc_remove_order_meta_boxes() {

  remove_meta_box('postcustom', 'shop_order', 'normal');
  remove_meta_box('woocommerce-order-downloads', 'shop_order', 'normal');

}