[gnome-shell] dialog: Remove addContent function

[Florian Müllner <fmuellner src gnome org>]

commit 914c6e48b1b2a6d2fc4724988221d373aded5dca
Author: Jonas Dreßler <verdre v0yd nl>
Date:   Thu Dec 5 08:55:16 2019 +0100

    dialog: Remove addContent function
    
    Now that child metas are removed, there's no need for a custom
    `addContent` function anymore. It was only used in one place anyway...
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/886

 js/ui/closeDialog.js | 2 +-
 js/ui/dialog.js      | 4 ----
 2 files changed, 1 insertion(+), 5 deletions(-)
---
diff --git a/js/ui/closeDialog.js b/js/ui/closeDialog.js
index 86d14059a5..8353b56cbf 100644
--- a/js/ui/closeDialog.js
+++ b/js/ui/closeDialog.js
@@ -67,7 +67,7 @@ var CloseDialog = GObject.registerClass({
         this._dialog.width = windowActor.width;
         this._dialog.height = windowActor.height;
 
-        this._dialog.addContent(this._createDialogContent());
+        this._dialog.contentLayout.add_child(this._createDialogContent());
         this._dialog.addButton({ label: _('Force Quit'),
                                  action: this._onClose.bind(this),
                                  default: true });
diff --git a/js/ui/dialog.js b/js/ui/dialog.js
index c2d2e04b61..0799ad27f3 100644
--- a/js/ui/dialog.js
+++ b/js/ui/dialog.js
@@ -99,10 +99,6 @@ class Dialog extends St.Widget {
         return this._initialKeyFocus || this;
     }
 
-    addContent(actor) {
-        this.contentLayout.add(actor, { expand: true });
-    }
-
     addButton(buttonInfo) {
         let { label, action, key } = buttonInfo;
         let isDefault = buttonInfo['default'];