[gnome-mines] help: Remove nonexistent screenshots from meson.build

[Piotr Drąg <piotrdrag src gnome org>]

commit c846b1f9a99b267b6fdbd94be8187cd78de125fc
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sat Sep 16 23:54:34 2017 +0200

    help: Remove nonexistent screenshots from meson.build

 help/meson.build |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/help/meson.build b/help/meson.build
index c6865c8..745c176 100644
--- a/help/meson.build
+++ b/help/meson.build
@@ -35,8 +35,6 @@ gnome.yelp ('gnome-mines',
                      'figures/hard-hints-1.png',
                      'figures/hard-hints-2.png',
                      'figures/hard-hints-3.png',
-                     'figures/highscores.png',
-                     'figures/imnotsureflagscheckbox.png',
                      'figures/logo32.png',
                      'figures/logo.png',
                      'figures/main-window.png',