$NetBSD: patch-shell_appdata_meson.build,v 1.1 2022/03/13 19:36:08 nia Exp $

Remove invalid positional argument. Previously this would have been
ignored, now it results in failures.

--- shell/appdata/meson.build.orig	2021-03-20 21:52:23.359853700 +0000
+++ shell/appdata/meson.build
@@ -1,7 +1,6 @@
 appdata = 'gnome-control-center.appdata.xml'
 
 i18n.merge_file(
-  appdata,
   input: appdata + '.in',
   output: appdata,
   po_dir: po_dir,