[meld/flatpak-ci] data: Update flatpak build to use meson

[Kai Willadsen <kaiw src gnome org>]

commit baae37599ed6bb4fd2ad49c984694cc4cd0ddfe9
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sun Sep 29 07:42:30 2019 +1000

    data: Update flatpak build to use meson

 data/org.gnome.meld-devel.json | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)
---
diff --git a/data/org.gnome.meld-devel.json b/data/org.gnome.meld-devel.json
index 9adb43a9..2148cdae 100644
--- a/data/org.gnome.meld-devel.json
+++ b/data/org.gnome.meld-devel.json
@@ -50,12 +50,7 @@
     },
     {
       "name": "meld",
-      "no-autogen": true,
-      "buildsystem": "simple",
-      "build-commands": [
-        "python3 setup.py build",
-        "python3 setup.py install --prefix /app"
-      ],
+      "buildsystem": "meson",
       "sources": [
         {
           "type": "git",