pewc_hidden_field_types_in_cart.php

<?php
/**
 * Hide certain field types in the cart and checkout
 */
function tester_hidden_field_types_in_cart( $field_types ) {
	$field_types = array( 'calculation', 'number' );
	return $field_types;
}
add_filter( 'pewc_hidden_field_types_in_cart', 'tester_hidden_field_types_in_cart' );