[gnome-shell] messageTray: Remove some dead code

[Jasper St. Pierre <jstpierre src gnome org>]

commit 158ca9746c7fd9f755a7e47445003f0ae0c6746d
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Thu Aug 1 22:48:33 2013 -0400

    messageTray: Remove some dead code
    
    notificationClosed is never set.

 js/ui/messageTray.js |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/js/ui/messageTray.js b/js/ui/messageTray.js
index bf333ec..41ae340 100644
--- a/js/ui/messageTray.js
+++ b/js/ui/messageTray.js
@@ -1709,7 +1709,6 @@ const MessageTray = new Lang.Class({
         this._notificationHovered = false;
 
         this._keyboardVisible = false;
-        this._notificationClosed = false;
         this._notificationState = State.HIDDEN;
         this._notificationTimeoutId = 0;
         this._notificationExpandedId = 0;
@@ -2286,7 +2285,7 @@ const MessageTray = new Lang.Class({
         let notificationLockedOut = !hasNotifications && this._notification;
         let notificationMustClose = (this._notificationRemoved || notificationLockedOut ||
                                      (notificationExpired && this._userActiveWhileNotificationShown) ||
-                                     this._notificationClosed || this._traySummoned);
+                                     this._traySummoned);
         let canShowNotification = notificationsPending && this._trayState == State.HIDDEN && 
!this._traySummoned;
 
         if (this._notificationState == State.HIDDEN) {