[gnome-dictionary] build: Use LINGUAS file for help

[Emmanuele Bassi <ebassi src gnome org>]

commit a67b13be5597ded1c04661f3d361838378a1f6c4
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sun Mar 18 18:29:03 2018 +0100

    build: Use LINGUAS file for help
    
    The old method is deprecated.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=794454

 help/LINGUAS     |   23 +++++++++++++++++++++++
 help/meson.build |   25 -------------------------
 2 files changed, 23 insertions(+), 25 deletions(-)
---
diff --git a/help/LINGUAS b/help/LINGUAS
new file mode 100644
index 0000000..ca8c1ab
--- /dev/null
+++ b/help/LINGUAS
@@ -0,0 +1,23 @@
+ca
+cs
+da
+de
+el
+en_GB
+es
+eu
+fi
+fr
+gl
+hu
+id
+it
+ko
+oc
+pl
+pt_BR
+ru
+sl
+sv
+uk
+zh_CN
diff --git a/help/meson.build b/help/meson.build
index 5a99e28..fb0e55e 100644
--- a/help/meson.build
+++ b/help/meson.build
@@ -24,29 +24,4 @@ gnome.yelp('gnome-dictionary',
            media: [
              'figures/gnome-dictionary-icon.png',
              'figures/gnome-dictionary.png',
-           ],
-           languages: [
-             'ca',
-             'cs',
-             'da',
-             'de',
-             'el',
-             'en_GB',
-             'es',
-             'eu',
-             'fi',
-             'fr',
-             'gl',
-             'hu',
-             'id',
-             'it',
-             'ko',
-             'oc',
-             'pl',
-             'pt_BR',
-             'ru',
-             'sl',
-             'sv',
-             'uk',
-             'zh_CN',
            ])