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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def absent(name, vname=None, use_32bit_registry=False):
    r'''
    Ensure a registry value is removed. To remove a key use key_absent.

    Args:
        name (str):
            A string value representing the full path of the key to include the
            HIVE, Key, and all Subkeys. For example:

            ``HKEY_LOCAL_MACHINE\\SOFTWARE\\Salt``

            Valid hive values include:

                - HKEY_CURRENT_USER or HKCU
                - HKEY_LOCAL_MACHINE or HKLM
                - HKEY_USERS or HKU

        vname (str):
            The name of the value you'd like to create beneath the Key. If this
            parameter is not passed it will assume you want to set the
            ``(Default)`` value

        use_32bit_registry (bool):
            Use the 32bit portion of the registry. Applies only to 64bit
            windows. 32bit Windows will ignore this parameter. Default is False.

    Returns:
        dict: A dictionary showing the results of the registry operation.

    CLI Example:

        .. code-block:: yaml

            'HKEY_CURRENT_USER\\SOFTWARE\\Salt':
              reg.absent
                - vname: version

        In the above example the value named ``version`` will be removed from
        the SOFTWARE\\Salt key in the HKEY_CURRENT_USER hive. If ``vname`` was
        not passed, the ``(Default)`` value would be deleted.
    '''
    ret = {'name': name,
           'result': True,
           'changes': {},
           'comment': ''}

    hive, key = _parse_key(name)

    # Determine what to do
    reg_check = __utils__['reg.read_value'](hive=hive,
                                            key=key,
                                            vname=vname,
                                            use_32bit_registry=use_32bit_registry)
    if not reg_check['success'] or reg_check['vdata'] == '(value not set)':
        ret['comment'] = '{0} is already absent'.format(name)
        return ret

    remove_change = {'Key': r'{0}\{1}'.format(hive, key),
                     'Entry': '{0}'.format(vname if vname else '(Default)')}

    # Check for test option
    if __opts__['test']:
        ret['result'] = None
        ret['changes'] = {'reg': {'Will remove': remove_change}}
        return ret

    # Delete the value
    ret['result'] = __utils__['reg.delete_value'](hive=hive,
                                                  key=key,
                                                  vname=vname,
                                                  use_32bit_registry=use_32bit_registry)
    if not ret['result']:
        ret['changes'] = {}
        ret['comment'] = r'Failed to remove {0} from {1}'.format(key, hive)
    else:
        ret['changes'] = {'reg': {'Removed': remove_change}}
        ret['comment'] = r'Removed {0} from {1}'.format(key, hive)

    return ret