Ensure that the VirtualBox Guest Additions are removed. Uses the CD,
    connected by VirtualBox.

    To connect VirtualBox Guest Additions via VirtualBox graphical interface
    press 'Host+D' ('Host' is usually 'Right Ctrl').

    name
        The name has no functional value and is only used as a tracking
        reference.
    force
        Force VirtualBox Guest Additions removing.

def additions_removed(name, force=False):
    '''
    Ensure that the VirtualBox Guest Additions are removed. Uses the CD,
    connected by VirtualBox.

    To connect VirtualBox Guest Additions via VirtualBox graphical interface
    press 'Host+D' ('Host' is usually 'Right Ctrl').

    name
        The name has no functional value and is only used as a tracking
        reference.
    force
        Force VirtualBox Guest Additions removing.
    '''
    ret = {'name': name, 'changes': {}, 'result': False, 'comment': ''}
    current_state = __salt__['vbox_guest.additions_version']()
    if not current_state:
        ret['result'] = True
        ret['comment'] = 'System already in the correct state'
        return ret
    if __opts__['test']:
        ret['comment'] = ('The state of VirtualBox Guest Additions will be '
                          'changed.')
        ret['changes'] = {
            'old': current_state,
            'new': True,
        }
        ret['result'] = None
        return ret

    new_state = __salt__['vbox_guest.additions_remove'](force=force)

    ret['comment'] = 'The state of VirtualBox Guest Additions was changed!'
    ret['changes'] = {
        'old': current_state,
        'new': new_state,
    }
    ret['result'] = bool(new_state)
    return ret