Communicating Applications Spec - Delete file

        Entry:
          AX = CB08h
          BX = event handle
          CX = receive file number
              0000h delete ALL received files and receive control file
              N     delete Nth received file
          DL = queue
              00h delete control file in task queue
              01h delete file in receive queue, as given by CX
              02h delete control file in log queue (individual deletions not
                  recommended, to maintain integrity of log)
        Return:
          AX = 0000h successful
             < 0 error code (see AX=CB01h)