def remove_last(target, remove_me):
    """
    Returns string `target` with last occurence of `remove_me` removed

    >>> remove_last('evacuate valorous vampires', 'va')
    'evacuate valorous mpires'
    """
    before = target[:target.rfind(remove_me)]
    after = target[target.rfind(remove_me) + len(remove_me):]
    return before + after
