Hide Free Discount Label (Discount:)

Hide the "Free Discount Label" (Discount:) from display.

add_filter('advanced_woo_discount_rules_free_product_option_key', function($label) {
    return 'wdr_free_discount';
});
add_action('wp_head', function() {
    ?>
        <style>dt.variation-wdr_free_discount { display: none; }</style>
    <?php
});