Remove Duplicate promotion messages

Eliminate duplicate promotional messages.

add_action('woocommerce_before_cart', function (){
    if(class_exists('\Wdr\App\Router')){
        remove_action('woocommerce_before_cart', array(\Wdr\App\Router::$manage_discount, 'showAppliedRulesMessages'));
		remove_action('woocommerce_before_cart', array(\Wdr\App\Router::$manage_discount, 'displayPromotionMessages'));
    }
}, 11);