[gnome-terminal] help: Remove duplicated sentence

[Andre Klapper <aklapper src gnome org>]

commit d3f0536def997586790c8b05606598831a38f96d
Author: Andre Klapper <a9016009 gmx de>
Date:   Sat Jan 4 17:46:02 2020 +0100

    help: Remove duplicated sentence

 help/C/adv-keyboard-shortcuts.page | 3 ---
 1 file changed, 3 deletions(-)
---
diff --git a/help/C/adv-keyboard-shortcuts.page b/help/C/adv-keyboard-shortcuts.page
index 866f3af0..b6f654d7 100644
--- a/help/C/adv-keyboard-shortcuts.page
+++ b/help/C/adv-keyboard-shortcuts.page
@@ -50,9 +50,6 @@
     <item>
       <p>Make sure <gui style="checkbox">Enable shortcuts</gui> is selected.</p>
     </item>
-    <item>
-      <p>Make sure <gui style="checkbox">Enable shortcuts</gui> is selected.</p>
-    </item>
     <item>
       <p>Select the shortcut that you wish to edit by clicking on it.</p>
     </item>