[frogr] meson: Don't use 'languages' parameter for gnome.yelp, use LINGUAS file

[Mario Sanchez Prada <msanchez src gnome org>]

commit 9f289ce06f39bdfcc0d0992cc5ffcf253f228dd7
Author: Mario Sanchez Prada <msanchez gnome org>
Date:   Tue Dec 26 15:08:46 2017 +0100

    meson: Don't use 'languages' parameter for gnome.yelp, use LINGUAS file
    
    This has been optional since 0.37 but a warning is printed since meson
    0.43 and will become a hard error in the future, so let's fix it now.

 help/LINGUAS     |   11 +++++++++++
 help/meson.build |   17 +----------------
 2 files changed, 12 insertions(+), 16 deletions(-)
---
diff --git a/help/LINGUAS b/help/LINGUAS
new file mode 100644
index 0000000..e421b8d
--- /dev/null
+++ b/help/LINGUAS
@@ -0,0 +1,11 @@
+cs
+de
+el
+en_GB
+es
+fr
+gl
+pt_BR
+ru
+sl
+sv
diff --git a/help/meson.build b/help/meson.build
index 981ceac..1b2b200 100644
--- a/help/meson.build
+++ b/help/meson.build
@@ -30,21 +30,6 @@ help_media = [
     'figures/preferences-misc.png'
 ]
 
-help_languages = [
-    'cs',
-    'de',
-    'el',
-    'en_GB',
-    'es',
-    'fr',
-    'gl',
-    'pt_BR',
-    'ru',
-    'sl',
-    'sv'
-]
-
 gnome.yelp('frogr',
            sources: help_pages,
-           media: help_media,
-           languages: help_languages)
+           media: help_media)