Add copyright and remove a warning message

gramps/gui/dbman.py

@@ -4,6 +4,7 @@
 # Copyright (C) 2000-2007  Donald N. Allingham
 # Copyright (C) 2009       Brian G. Matherly
 # Copyright (C) 2009       Gary Burton
+# Copyright (C) 2021-      Serge Noiraud
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -1387,8 +1388,6 @@ class NoviceSelection(ManagedWindow, DbLoader):
             self.dbmanager.firsttime.set_sensitive(False)
             os.unlink(file_to_load)
 
-        ManagedWindow.close(self, obj)
-
     def load_database_selection(self, *arg):
         """
         Select the gedcom/gramps file to load