def remove_false_key(namespace, key):
    """
    If key is in the namespace and has a value of False, remove it.
    :param namespace: The namespace
    :param key: The key
    :return: None. The namespace passed in the argument is
    modified in place.
    """
    if key in namespace.__dict__ and not namespace.__dict__[key]:
        del namespace.__dict__[key]

    return None