def takenone(levels, **_):
    """ Completely ignores the input sequence and returns an empty tuple.

    Potentially useful if you want to generate a progression that completely ignores Objectives... or something like that.
    I don't even remember why I wrote this function.

    >>> takenone([1, 2, 3, 4])
    ()

    Args:
        levels: A sequence of Level objects. COmpletely ignored.

    Returns: The empty tuple ()
    """
    return ()