VMS Help CMS, REMOVE, GROUP, Description  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    The REMOVE GROUP command removes a group from another group. The
    command does not delete the group from the library, but there is
    no longer any association between the two groups. Removing group
    A from group B means that the contents of group A are no longer
    accessible through group B.