def remove_repeated_element(repeated_list):
    """
    Remove duplicate elements

    :param repeated_list: input list
    :return: List without duplicate elements
    """
    repeated_list.sort()
    new_list = [repeated_list[k] for k in range(len(repeated_list)) if
                k == 0 or repeated_list[k] != repeated_list[k - 1]]
    return new_list