[gnome-shell] modalDialog: Remove unused parentActor param

[Rui Matos <rtcm src gnome org>]

commit 1b78dd662b12c9fa2951d71c456d808e160d54cf
Author: Rui Matos <tiagomatos gmail com>
Date:   Tue Mar 18 14:41:26 2014 +0100

    modalDialog: Remove unused parentActor param
    
    No ModalDialog users set this so let's hardcode it.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=719451

 js/ui/modalDialog.js |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/js/ui/modalDialog.js b/js/ui/modalDialog.js
index 366e425..be16128 100644
--- a/js/ui/modalDialog.js
+++ b/js/ui/modalDialog.js
@@ -41,7 +41,6 @@ const ModalDialog = new Lang.Class({
     _init: function(params) {
         params = Params.parse(params, { shellReactive: false,
                                         styleClass: null,
-                                        parentActor: Main.uiGroup,
                                         keybindingMode: Shell.KeyBindingMode.SYSTEM_MODAL,
                                         shouldFadeIn: true,
                                         destroyOnClose: true });
@@ -57,7 +56,7 @@ const ModalDialog = new Lang.Class({
                                       x: 0,
                                       y: 0,
                                       accessible_role: Atk.Role.DIALOG });
-        params.parentActor.add_actor(this._group);
+        Main.uiGroup.add_actor(this._group);
 
         let constraint = new Clutter.BindConstraint({ source: global.stage,
                                                       coordinate: Clutter.BindCoordinate.ALL });