[gnome-boxes] Remove Ctrl+F1 shortcut from Keyboard Shortcuts page

[Felipe Borges <felipeborges src gnome org>]

commit 3fb2e96c1d7eb6a670b04f9cd2715c5a01707254
Author: Sabri Ünal <libreajans gmail com>
Date:   Tue Feb 11 12:33:55 2020 +0000

    Remove Ctrl+F1 shortcut from Keyboard Shortcuts page
    
    It used to work but, due to a conflict, it was removed
    (https://gitlab.gnome.org/GNOME/gtk/issues/626)

 data/ui/kbd-shortcuts-window.ui | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/data/ui/kbd-shortcuts-window.ui b/data/ui/kbd-shortcuts-window.ui
index 7aaef229..adf37005 100644
--- a/data/ui/kbd-shortcuts-window.ui
+++ b/data/ui/kbd-shortcuts-window.ui
@@ -61,7 +61,7 @@
             <child>
               <object class="GtkShortcutsShortcut">
                 <property name="visible">1</property>
-                <property name="accelerator">&lt;Ctrl&gt;F1 &lt;Ctrl&gt;question</property>
+                <property name="accelerator">&lt;Ctrl&gt;question</property>
                 <property name="title" translatable="yes" context="shortcut window">Keyboard 
shortcuts</property>
               </object>
             </child>