[five-or-more] help: Remove 'Available Themes' section

[Andre Klapper <aklapper src gnome org>]

commit e8bf9c0e30b1b2ca8b9bd07661b62d9aa1b5ce84
Author: Andre Klapper <a9016009 gmx de>
Date:   Sat Mar 2 12:01:36 2019 +0100

    help: Remove 'Available Themes' section
    
    Available themes change over time so it's cumbersome to keep it updated and it
    only contains screenshots which is not incredibly helpful.

 help/C/change-theme.page        |  11 -----------
 help/C/figures/color-balls.png  | Bin 19885 -> 0 bytes
 help/C/figures/color-shapes.png | Bin 13073 -> 0 bytes
 help/meson.build                |   2 --
 4 files changed, 13 deletions(-)
---
diff --git a/help/C/change-theme.page b/help/C/change-theme.page
index 223c2a5..d3bbc07 100644
--- a/help/C/change-theme.page
+++ b/help/C/change-theme.page
@@ -34,15 +34,4 @@
     <item><p>Close the <gui>Preferences</gui> dialog.</p></item>
   </steps>
 
-  <section id="images">
-    <title>Available Themes</title>
-    <media type="image" src="figures/color-balls.png" width="300" style="floatleft" its:translate="no">
-      <p its:translate="yes">Five or More with different balls</p>
-    </media>
-
-    <media type="image" src="figures/color-shapes.png" width="300" its:translate="no">
-      <p its:translate="yes"><app>Five or More</app> with different shapes</p>
-    </media>
-  </section>
-
 </page>
diff --git a/help/meson.build b/help/meson.build
index 3520472..1a11d6a 100644
--- a/help/meson.build
+++ b/help/meson.build
@@ -16,8 +16,6 @@ five_or_more_help_pages = [
 ]
 
 five_or_more_help_media = [
-  'figures/color-balls.png',
-  'figures/color-shapes.png',
   'figures/diagonal.png',
   'figures/glines-demo.ogv',
   'figures/glines-gameover.png',