[accerciser] help: Remove unhelpful Preferences screenshot.

[Andre Klapper <aklapper src gnome org>]

commit 0376a9896287fecb9567bb25ed9a9e1658a2a7a5
Author: Andre Klapper <a9016009 gmx de>
Date:   Sun Mar 24 16:22:36 2019 +0100

    help: Remove unhelpful Preferences screenshot.
    
    Given the help text it provides no actual value and only creates additional
    translation/localization costs.

 help/C/figures/accerciser_preferences.png | Bin 95652 -> 0 bytes
 help/C/preferences.page                   |  12 ------------
 help/Makefile.am                          |   1 -
 3 files changed, 13 deletions(-)
---
diff --git a/help/C/preferences.page b/help/C/preferences.page
index 85fbecc..4c2b26f 100644
--- a/help/C/preferences.page
+++ b/help/C/preferences.page
@@ -28,18 +28,6 @@
     <gui>Preferences</gui></guiseq> to open a dialog.
   </p>
 
-  <figure>
-    <title><app>Accerciser</app> preferences</title>
-    <desc>
-      <app>Accerciser</app> allows you to configure plugins, global hotkeys, and widget's highlighting.
-    </desc>
-    <media type="image" mime="image/png" width="900" height="500" src="figures/accerciser_preferences.png">
-      <p>
-        <app>Accerciser</app> allows you to configure plugins, global hotkeys, and widget's highlighting.
-      </p>
-    </media>
-  </figure>
-
   <section id="plugin">
     <title>Configuring plugins</title>
     <p>
diff --git a/help/Makefile.am b/help/Makefile.am
index cbd0eaa..721ce7b 100644
--- a/help/Makefile.am
+++ b/help/Makefile.am
@@ -5,7 +5,6 @@ HELP_ID= accerciser
 HELP_MEDIA = \
        figures/accerciser-logo.png \
        figures/highlighting.png \
-       figures/accerciser_preferences.png \
        figures/interface_viewer_plugin.png \
        figures/accerciser-view.png \
        figures/IPython_plugin.png \