[gnome-mines] Refs #39: Update documentation mentioning removed feature

[Robert Roth <robertroth src gnome org>]

commit 9be53b18a7426eaa8bca68214f5da63d20685034
Author: Robert Roth <robert roth off gmail com>
Date:   Thu Nov 14 01:31:43 2019 +0200

    Refs #39: Update documentation mentioning removed feature

 help/C/flags.page    |  8 --------
 help/C/get-help.page | 37 -------------------------------------
 help/meson.build     |  1 -
 3 files changed, 46 deletions(-)
---
diff --git a/help/C/flags.page b/help/C/flags.page
index ae27c8c..9d094f9 100644
--- a/help/C/flags.page
+++ b/help/C/flags.page
@@ -63,14 +63,6 @@
         </tr>
       </table>
 
-      <note style="tip">
-       <p>To make the number of available flags equal to the number of
-       remaining mines, pressing the menu button in the top-right corner of the
-       window and enable the <gui style="checkbox">Show Warnings</gui>
-       and <gui style="checkbox">Use Question Flags</gui>
-       preferences.</p>
-     </note>
-
   </section>
 
   <section id="flags-blue">
diff --git a/help/meson.build b/help/meson.build
index e80a5c6..cc16d5d 100644
--- a/help/meson.build
+++ b/help/meson.build
@@ -4,7 +4,6 @@ gnome.yelp ('gnome-mines',
                        'develop.page',
                        'documentation.page',
                        'flags.page',
-                       'get-help.page',
                        'high-scores.page',
                        'index.page',
                        'license.page',