[gnome-shell] loginDialog: Remove unused variable

[Florian Müllner <fmuellner src gnome org>]

commit 2a63267be0fb58a1f3db108da62d30ccba45e481
Author: Florian Müllner <fmuellner gnome org>
Date:   Thu Apr 3 14:41:15 2014 +0200

    loginDialog: Remove unused variable

 js/gdm/loginDialog.js |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/js/gdm/loginDialog.js b/js/gdm/loginDialog.js
index e66789d..47410ef 100644
--- a/js/gdm/loginDialog.js
+++ b/js/gdm/loginDialog.js
@@ -48,8 +48,6 @@ const _SCROLL_ANIMATION_TIME = 0.5;
 const _TIMED_LOGIN_IDLE_THRESHOLD = 5.0;
 const _LOGO_ICON_HEIGHT = 48;
 
-let _loginDialog = null;
-
 const UserListItem = new Lang.Class({
     Name: 'UserListItem',