This isn't needed any more

lib/notification.js

@@ -15,9 +15,6 @@ function Notification (payload) {
 	/** @deprecated since v1.3.0 used connection#pushNotification instead which accepts device token separately **/
 	this.device = undefined;
 
-	/** @since v1.2.0 */
-	this.newsstandAvailable = undefined;
-
 	this.contentAvailable = undefined;
 
 	this.mdm = undefined;