[gnome-games] preferences-page: Stop using pass-through child property

[Alexander Mikhaylenko <alexm src gnome org>]

commit 7a1726bebf26eadc40ed6aa538b5f56f4b439658
Author: Alexander Mikhaylenko <exalm7659 gmail com>
Date:   Fri May 17 20:45:34 2019 +0500

    preferences-page: Stop using pass-through child property
    
    The default value works here, and it has been removed from GTK4 anyway.

 data/ui/preferences-page.ui | 3 ---
 1 file changed, 3 deletions(-)
---
diff --git a/data/ui/preferences-page.ui b/data/ui/preferences-page.ui
index 1af35619..b420b53d 100644
--- a/data/ui/preferences-page.ui
+++ b/data/ui/preferences-page.ui
@@ -70,9 +70,6 @@
                       </object>
                     </child>
                   </object>
-                  <packing>
-                    <property name="pass-through">True</property>
-                  </packing>
                 </child>
               </object>
             </child>