[gnome-chess] help: Remove fullscreen mode - not implemented

[Andre Klapper <aklapper src gnome org>]

commit 193d827dbca6022c93a1600ebdfbf4a9519307f6
Author: Andre Klapper <a9016009 gmx de>
Date:   Wed Sep 5 10:42:31 2018 +0200

    help: Remove fullscreen mode - not implemented

 help/C/shortcuts.page | 4 ----
 1 file changed, 4 deletions(-)
---
diff --git a/help/C/shortcuts.page b/help/C/shortcuts.page
index 3287d18..0d342a7 100644
--- a/help/C/shortcuts.page
+++ b/help/C/shortcuts.page
@@ -32,10 +32,6 @@
          <td><p>Undo Move</p></td>
          <td><p><keyseq><key>Ctrl</key><key>Z</key></keyseq></p></td>
        </tr>
-       <tr>
-         <td><p>Fullscreen</p></td>
-         <td><p><key>F11</key></p></td>
-       </tr>
        <tr>
           <td><p>Help</p></td>
           <td><p><key>F1</key></p></td>