flatpak: Sync with Flathub

pkgs/flatpak/testing/libadwaita.json

@@ -1,21 +0,0 @@
-{
-    "name": "libadwaita",
-    "buildsystem": "meson",
-    "config-opts": [
-        "--buildtype=release",
-        "--wrap-mode=nofallback",
-        "-Dintrospection=enabled",
-        "-Dvapi=false",
-        "-Dgtk_doc=false",
-        "-Dtests=false",
-        "-Dexamples=false"
-    ],
-    "sources": [
-        {
-            "type": "git",
-            "url": "https://gitlab.gnome.org/GNOME/libadwaita.git",
-            "tag": "1.1.1",
-            "commit": "5ec9f624b23bf78b29dd708e77ccdfcee0a9867a"
-        }
-    ]
-}