def METHOD_NAME(setting_update):
    """Update the Hostname_facts settings without any string(empty values)
    :id: b8e260fc-e263-4292-aa2f-ab37085c7758
    :parametrized: yes
    :expectedresults: Error should be raised on setting empty value for discovery_hostname
        setting
    """
    setting_update.value = ""
    with pytest.raises(HTTPError):
        setting_update.update({'value'})