[gnome-shell] unlockDialog: Don't explicitly show prompt

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 41b4c51341de37663a4034b7bb66392f57017a4a
Author: Florian Müllner <fmuellner gnome org>
Date:   Fri Feb 14 14:51:10 2020 +0100

    unlockDialog: Don't explicitly show prompt
    
    The promptBox is initially fully opaque, so showing it before the
    transition can result in a brief flash before fading in.
    
    Just remove the show() call and let the transition handle the
    visibility.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/issues/2212

 js/ui/unlockDialog.js | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/js/ui/unlockDialog.js b/js/ui/unlockDialog.js
index dd6f971cff..cae22f20e1 100644
--- a/js/ui/unlockDialog.js
+++ b/js/ui/unlockDialog.js
@@ -665,7 +665,6 @@ var UnlockDialog = GObject.registerClass({
             return;
 
         this._activePage = this._promptBox;
-        this._promptBox.show();
 
         this._adjustment.ease(1, {
             duration: CROSSFADE_TIME,