[gnome-control-center] region: update HdyLeaflet usage in CcFormatChooser

[Robert Ancell <rancell src gnome org>]

commit d6ef1036acec39c63901c87601d9f84435c75824
Author: Ian Douglas Scott <idscott system76 com>
Date:   Wed Jul 29 11:36:51 2020 -0700

    region: update HdyLeaflet usage in CcFormatChooser
    
    This resulted in a crash when trying to open the dialog. It seems this
    was changed in libhandy 1.
    
    Mentioned in https://gitlab.gnome.org/GNOME/gnome-control-center/-/merge_requests/785#note_878171

 panels/region/cc-format-chooser.ui | 2 --
 1 file changed, 2 deletions(-)
---
diff --git a/panels/region/cc-format-chooser.ui b/panels/region/cc-format-chooser.ui
index 0222980aa..35cbd8ac1 100644
--- a/panels/region/cc-format-chooser.ui
+++ b/panels/region/cc-format-chooser.ui
@@ -84,8 +84,6 @@
             <property name="can_focus">False</property>
             <property name="hexpand">True</property>
             <property name="vexpand">True</property>
-            <property name="mode-transition-type">slide</property>
-            <property name="child-transition-type">slide</property>
             <signal name="notify::fold" handler="format_chooser_leaflet_fold_changed_cb" 
object="CcFormatChooser" swapped="yes"/>
             <child>
               <object class="GtkBox">