[gnome-software] trivial: Fix an unused variable compiler warning

[Kalev Lember <klember src gnome org>]

commit bc97916fe31c4d4d84f760b12ce9f8650bd464bd
Author: Kalev Lember <klember redhat com>
Date:   Mon Oct 15 16:37:34 2018 +0200

    trivial: Fix an unused variable compiler warning

 src/gs-shell.c | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/src/gs-shell.c b/src/gs-shell.c
index 6ffe40e6..de586a79 100644
--- a/src/gs-shell.c
+++ b/src/gs-shell.c
@@ -775,7 +775,6 @@ static gboolean
 main_window_closed_cb (GtkWidget *dialog, GdkEvent *event, gpointer user_data)
 {
        GsShell *shell = user_data;
-       GsShellPrivate *priv = gs_shell_get_instance_private (shell);
 
        /* hide any notifications */
        g_application_withdraw_notification (g_application_get_default (),