On Alpha and Integrity server systems, deletes an extension
    attached to a persona.
    Format
      SYS$PERSONA_DELETE_EXTENSION  persona ,extensionID
    C Prototype
      int sys$persona_delete_extension  (unsigned int *persona,
                                        unsigned int *extensionID);
1 – Arguments
 persona
    OpenVMS usage:persona
    type:         longword (unsigned)
    access:       read only
    mechanism:    by reference
    Address of a longword containing the persona identification for
    which $PERSONA_DELETE_EXTENSION calls the registered Extension
    Delete function.
 extensionID
    OpenVMS usage:extension_ID
    type:         longword (unsigned)
    access:       read only
    mechanism:    by reference
    Address of a longword containing the extension identification
    (EID) for which the registered DELETE routine is called in order
    to delete a persona extension block from the specified persona.