def ptcrb_cleaner_multios(item):
    """
    Discard multiple entries for "OS".

    :param item: The item to clean.
    :type item: str
    """
    if item.count('OS') > 1:
        templist = item.split('OS')
        templist[0] = 'OS'
        item = ''.join([templist[0], templist[1]])
    return item
