Remove Applied rule message from Checkout

Remove "Applied rule" message from Checkout page.

add_action('wp_loaded', function() {
    if(class_exists('\Wdr\App\Router') && isset(\Wdr\App\Router::$manage_discount)) {
        $show_rule_message = \Wdr\App\Router::$manage_discount::$config->getConfig('show_applied_rules_message_on_cart', 0);
        if (!empty($show_rule_message)) {
            remove_action('woocommerce_review_order_before_cart_contents', array(\Wdr\App\Router::$manage_discount, 'displayPromotionMessagesInCheckout'), 10);
        }
    }
}, 100);