program.py: remove config parameter from list subscriptions

lib_stov/program.py

@@ -120,8 +120,7 @@ def list_subscriptions():
 
     """
     database = Db.get_instance()
-    conf = Conf.get_instance()
-    subscriptions_list = database.get_subscriptions(conf)
+    subscriptions_list = database.get_subscriptions()
     sub_state = None
     if subscriptions_list:
         LOGGER.info(_("ID Title Site"))