[gnome-mines] help: Remove unused preferences.png figure from user help

[Andre Klapper <aklapper src gnome org>]

commit 4a0eef372247ad9379c114b527c4c98f9b4e6664
Author: Andre Klapper <a9016009 gmx de>
Date:   Tue Sep 26 16:04:53 2017 +0200

    help: Remove unused preferences.png figure from user help

 help/C/figures/preferences.png |  Bin 27050 -> 0 bytes
 help/Makefile.am               |    1 -
 help/meson.build               |    1 -
 3 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/help/Makefile.am b/help/Makefile.am
index dadf72d..b3317ee 100644
--- a/help/Makefile.am
+++ b/help/Makefile.am
@@ -15,7 +15,6 @@ HELP_MEDIA = \
        figures/logo32.png \
        figures/logo.png \
        figures/main-window.png \
-       figures/preferences.png \
        figures/statusbar.png
 
 HELP_FILES = \
diff --git a/help/meson.build b/help/meson.build
index 745c176..9999814 100644
--- a/help/meson.build
+++ b/help/meson.build
@@ -38,7 +38,6 @@ gnome.yelp ('gnome-mines',
                      'figures/logo32.png',
                      'figures/logo.png',
                      'figures/main-window.png',
-                     'figures/preferences.png',
                      'figures/statusbar.png' ],
             languages: languages,
             symlink_media: true)