[gnome-sudoku] help: Remove DocBook translations

[Piotr Drąg <piotrdrag src gnome org>]

commit 7262719d5b36b38a83bf6580e5b5e6c98be8394a
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sun Mar 10 21:31:15 2019 +0100

    help: Remove DocBook translations

 help/LINGUAS              |   11 -
 help/ca/ca.po             | 1126 ---------------------------------------------
 help/da/da.po             | 1115 --------------------------------------------
 help/en_GB/en_GB.po       | 1009 ----------------------------------------
 help/eu/eu.po             | 1016 ----------------------------------------
 help/it/it.po             |  558 ----------------------
 help/oc/oc.po             |  769 -------------------------------
 help/ru/ru.po             |  561 ----------------------
 help/sl/sl.po             |  805 --------------------------------
 help/sr/sr.po             | 1016 ----------------------------------------
 help/sr@latin/sr latin po | 1016 ----------------------------------------
 help/zh_CN/zh_CN.po       |  951 --------------------------------------
 12 files changed, 9953 deletions(-)
---
diff --git a/help/LINGUAS b/help/LINGUAS
index 7b8c3ad..1b69ca0 100644
--- a/help/LINGUAS
+++ b/help/LINGUAS
@@ -1,22 +1,11 @@
-ca
 cs
-da
 de
-en_GB
 el
 es
-eu
 fr
 gl
 hu
-it
 ko
-oc
 pl
 pt_BR
-ru
-sl
-sr
-sr@latin
 sv
-zh_CN