[totem/mallard-documentation] Remove non-existing shortcuts

[Andre Klapper <aklapper src gnome org>]

commit ac77978cf9cfb90ea408051de1c4901fb5238756
Author: Andre Klapper <a9016009 gmx de>
Date:   Sat Jan 12 00:47:55 2019 +0100

    Remove non-existing shortcuts

 help/C/keyboard-shortcuts.page | 8 --------
 1 file changed, 8 deletions(-)
---
diff --git a/help/C/keyboard-shortcuts.page b/help/C/keyboard-shortcuts.page
index 815411c0..ade44897 100644
--- a/help/C/keyboard-shortcuts.page
+++ b/help/C/keyboard-shortcuts.page
@@ -56,14 +56,6 @@
   <title>Playing media</title>
 
   <table frame="all" shade="rows">
-    <tr>
-      <td><p>Chapter menu</p></td>
-      <td><p><keyseq><key>Ctrl</key><key>C</key></keyseq></p></td>
-    </tr>
-    <tr>
-      <td><p>DVD menu</p></td>
-      <td><p><keyseq><key>Ctrl</key><key>M</key></keyseq></p></td>
-    </tr>
     <tr>
       <td><p>Fullscreen</p></td>
       <td><p><key>F11</key></p></td>