Remove Shipping Fields on a Cart with no Shippable Items

no-ship-sherlock.php

<?php
function wpsc_hide_shipping_fields_if_no_shipping( $fields ) {

	if ( wpsc_uses_shipping() || is_admin() ) {
		return $fields;
	}

	foreach ( $fields as $index => $field ) {
		if ( false !== strpos( $field->unique_name, 'shipping' ) || 'delivertoafriend' == $field->unique_name ) {
			unset( $fields[ $index ] );
		}
	}

    return array_values( $fields );
}

add_filter( 'wpsc_checkout_fields', 'wpsc_hide_shipping_fields_if_no_shipping' );