Description

   The DELETE CLASS command deletes one or more classes from a CMS
   library. The class must exist and must not contain any element
   generations unless the /REMOVE_CONTENTS qualifier is specified.
   If the /REMOVE_CONTENTS qualifier is not specified and any
   generations belong to the class, CMS issues an error message and
   does not delete the class. If the /REMOVE_CONTENTS qualifier is
   not specified, use the REMOVE GENERATION command to remove element
   generations from a class before issuing the DELETE CLASS command.

   Even though a class is deleted, records of transactions that
   created and used the class are retained in the library history.
   You can reuse the deleted class name to create a new class.
   However, there is no distinction between the two classes in the
   project history, except that their transactions are separated by
   entries for DELETE CLASS and CREATE CLASS commands.

   To determine which generations belong to a class, use the SHOW
   CLASS command with the /CONTENTS qualifier.