Everett M. Greene wrote:

Are you saying that a telephone call isn't made or are
you saying that nobody in the tower closes the flight
plan?


What is so hard about this? When you cancel IFR inflight all
controllers down the line from whatever point you cancelled must be
notified that you have cancelled. This is normally done by the
computer, controllers receive a "remove strips" message for your
flight. When you land at a controlled field you're at the end of the
line. There are no controllers down the line to advise that you've
cancelled because you're at the end of the line.