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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 delete(zone):
    '''
    Delete the specified configuration from memory and stable storage.

    zone : string
        name of zone

    CLI Example:

    .. code-block:: bash

        salt '*' zonecfg.delete epyon
    '''
    ret = {'status': True}

    # delete zone
    res = __salt__['cmd.run_all']('zonecfg -z {zone} delete -F'.format(
        zone=zone,
    ))
    ret['status'] = res['retcode'] == 0
    ret['message'] = res['stdout'] if ret['status'] else res['stderr']
    if ret['message'] == '':
        del ret['message']
    else:
        ret['message'] = _clean_message(ret['message'])

    return ret