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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_configuration():
 """Delete a RAID configuration on this server. :returns: the current RAID configuration after deleting all the logical disks. """

    server = objects.Server()

    select_controllers = lambda x: not x.properties.get('HBA Mode Enabled',
                                                        False)
    _select_controllers_by(server, select_controllers, 'RAID enabled')

    for controller in server.controllers:
        # Trigger delete only if there is some RAID array, otherwise
        # hpssacli/ssacli will fail saying "no logical drives found.".
        if controller.raid_arrays:
            controller.delete_all_logical_drives()
    return get_configuration()