Modifies the Manual Area Addresses attribute of the Routing
    entity to remove the specified area or areas.

    remove [node node-id] routing -
           manual area addresses {area[,area...]}

    Manual Area Addresses

    Support: L1,L2
    Default: No area addresses        Value: Set of area addresses

    Area addresses to be used for this node. An area address cannot
    be a Phase IV address or the address DefaultArea.

    If the characteristic manual L1 algorithm has the value routing
    vector, this set must be empty, and the characteristic phase iv
    address must not be 0.0. If the characteristic phase iv address
    is 0.0, there must be at least one area address.