def remove_duplicates(list1):
    """
    Eliminate duplicates in a sorted list.

    Returns a new sorted list with the same elements in list1, but
    with no duplicates.

    This function can be iterative.
    """
    
    list_unique = []
    append = list_unique.append
    
    for element in list1:
        if element not in list_unique:
            append(element)
    
    return list_unique