Deletes a Resource Manager instance (RMI) from the calling
    process.

    $FORGET_RMW always waits for the request to complete before
    returning to the caller. Other than this, it is identical to
    $FORGET_RM.

    Format

      SYS$FORGET_RMW  [efn] ,[flags] ,iosb ,[astadr] ,[astprm] ,rm_id

    C Prototype

      int sys$forget_rmw  (unsigned int efn, unsigned int

                          flags, struct _iosb *iosb, void

                          (*astadr)(__unknown_params), int astprm,

                          unsigned int rm_id);