Hide field types in cart and checkout

You can keep certain field types hidden in the cart and the checkout if you wish:

	<?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' );