[gnome-chess] help: Drop Keyboard Shortcuts page

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 7ad50dbd3597ddbee9fb5e4875e73a479ad793d5
Author: Jeremy Bicha <jbicha ubuntu com>
Date:   Thu Jan 10 14:46:42 2019 -0500

    help: Drop Keyboard Shortcuts page
    
    We don't need it any more since we have a Keyboard Shortcuts overlay.
    And there were no complaints about removing the page.

 help/C/shortcuts.page | 51 ---------------------------------------------------
 help/meson.build      |  1 -
 2 files changed, 52 deletions(-)
---
diff --git a/help/meson.build b/help/meson.build
index 8fffc8c..05d8c00 100644
--- a/help/meson.build
+++ b/help/meson.build
@@ -10,7 +10,6 @@ help_sources = [
   'play.page',
   'rules.page',
   'save-resume.page',
-  'shortcuts.page',
   'timer.page',
   'translate.page',
 ]