[balsa/wip/gtk4] main-window: Do not call gtk_main_quit()

[Peter Bloomfield <peterb src gnome org>]

commit e8862060003565af0cda27d2bd2e7f7b88152073
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Mon Jun 25 17:33:59 2018 -0400

    main-window: Do not call gtk_main_quit()
    
    as the "destroy" signal handler.

 src/main-window.c | 5 -----
 1 file changed, 5 deletions(-)
---
diff --git a/src/main-window.c b/src/main-window.c
index 1d2393f00..e5b042e36 100644
--- a/src/main-window.c
+++ b/src/main-window.c
@@ -2408,14 +2408,9 @@ balsa_window_new(GtkApplication *application)
 #endif                         /* HAVE_HTML_WIDGET */
     balsa_window_enable_continue(window);
 
-    /* set initial state of toggle preview pane button */
-
     /* set initial state of next-unread controls */
     bw_enable_next_unread(window, FALSE);
 
-    g_signal_connect(window, "destroy",
-                     G_CALLBACK(gtk_main_quit), NULL);
-
     /* Cancel new-mail notification when we get the focus. */
     g_signal_connect(window, "notify::is-active",
                      G_CALLBACK(bw_is_active_notify), NULL);