[gnome-nibbles] help: Do not list the game speed choices; they are self-explaining

[Andre Klapper <aklapper src gnome org>]

commit 8a4605d9de247ee454173d13918bbd48e1094804
Author: Andre Klapper <a9016009 gmx de>
Date:   Sun Jan 5 00:53:23 2020 +0100

    help: Do not list the game speed choices; they are self-explaining

 help/C/preferences.page | 18 ------------------
 1 file changed, 18 deletions(-)
---
diff --git a/help/C/preferences.page b/help/C/preferences.page
index d090eef..9ba9065 100644
--- a/help/C/preferences.page
+++ b/help/C/preferences.page
@@ -32,24 +32,6 @@
 <section id="speed">
   <title>Speed</title>
 
-  <p>There are four available speeds in <app>Nibbles</app>. These are, in
-  increasing order:</p>
-
-  <list>
-    <item>
-      <p>Nibbles Newbie</p>
-    </item>
-    <item>
-      <p>My second day</p>
-    </item>
-    <item>
-      <p>Not too shabby</p>
-    </item>
-    <item>
-      <p>Finger twitching good</p>
-    </item>
-  </list>
-
   <p>Speed can be changed in <guiseq><gui style="menu">Settings</gui>
   <gui style="menuitem">Preferences</gui></guiseq> by selecting one of
   the four speed choices given on the left hand side.</p>