[dia] flatpak: revert to upstream gtk2 build

[Zander <zbrown src gnome org>]

commit af6470560e5736c990e5084885eb1ff011d5c268
Author: Zander Brown <zbrown gnome org>
Date:   Thu Aug 29 17:30:02 2019 +0100

    flatpak: revert to upstream gtk2 build
    
    upstream now has our fix

 build-aux/flatpak/gtk2-use-adwaita-theme.patch |  80 ------------------
 build-aux/flatpak/gtk2.json                    | 108 -------------------------
 build-aux/flatpak/org.gnome.Dia.json           |   3 +-
 build-aux/flatpak/shared-modules               |   2 +-
 4 files changed, 2 insertions(+), 191 deletions(-)
---
diff --git a/build-aux/flatpak/org.gnome.Dia.json b/build-aux/flatpak/org.gnome.Dia.json
index c1ee6565..fb78a2fd 100644
--- a/build-aux/flatpak/org.gnome.Dia.json
+++ b/build-aux/flatpak/org.gnome.Dia.json
@@ -32,8 +32,7 @@
         "*.a"
     ],
     "modules": [
-       "shared-modules/intltool/intltool-0.51.json",
-        "gtk2.json",
+        "shared-modules/gtk2/gtk2.json",
         "shared-modules/python2.7/python-2.7.json",
         {
                "name": "pango",
diff --git a/build-aux/flatpak/shared-modules b/build-aux/flatpak/shared-modules
index c0bdf798..84e724af 160000
--- a/build-aux/flatpak/shared-modules
+++ b/build-aux/flatpak/shared-modules
@@ -1 +1 @@
-Subproject commit c0bdf798e31da54a8f8bcb25ca17ad957515e1ca
+Subproject commit 84e724af2abe5334685fe462bec6d0bbf806d03a