[gnome-builder] flatpak: remove gsystem from deps

[Christian Hergert <chergert src gnome org>]

commit 5cdfa20b68af42f62f46a4a88b242c6568c5d74e
Author: Christian Hergert <chergert redhat com>
Date:   Mon Oct 16 00:45:59 2017 -0700

    flatpak: remove gsystem from deps

 build-aux/flatpak/org.gnome.Builder.json |    9 ---------
 1 files changed, 0 insertions(+), 9 deletions(-)
---
diff --git a/build-aux/flatpak/org.gnome.Builder.json b/build-aux/flatpak/org.gnome.Builder.json
index b0f733a..dcb987a 100644
--- a/build-aux/flatpak/org.gnome.Builder.json
+++ b/build-aux/flatpak/org.gnome.Builder.json
@@ -86,15 +86,6 @@
             ]
         },
         {
-            "name": "libgsystem",
-            "sources": [
-                {
-                    "type": "git",
-                    "url": "https://git.gnome.org/browse/libgsystem.git";
-                }
-            ]
-        },
-        {
             "name": "ostree",
             "config-opts": [ "--disable-man" ],
             "cleanup": [ "/bin",