[gnome-software] trivial: Remove an unused struct member

[Kalev Lember <klember src gnome org>]

commit 11f7711a3b960a55d91b9c4be5a84dd96d70ba09
Author: Kalev Lember <klember redhat com>
Date:   Fri Jun 14 10:46:47 2019 +0200

    trivial: Remove an unused struct member

 plugins/flatpak/gs-flatpak-transaction.c | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/plugins/flatpak/gs-flatpak-transaction.c b/plugins/flatpak/gs-flatpak-transaction.c
index 9d5d4a36..45937125 100644
--- a/plugins/flatpak/gs-flatpak-transaction.c
+++ b/plugins/flatpak/gs-flatpak-transaction.c
@@ -13,7 +13,6 @@
 
 struct _GsFlatpakTransaction {
        FlatpakTransaction       parent_instance;
-       FlatpakInstallation     *installation;
        GHashTable              *refhash;       /* ref:GsApp */
        GError                  *first_operation_error;
 };