Following up from #12629 there are some mysterious input hook calls in _macosx that we aren[t sure if they are necessary anymore...

Originally posted by @mattip in #12629 (comment)

My guess is they were needed at one point to allow the tkinter event loop and the REPL event loop to play nicely. But then why were they MacOS only, unless at one point python vendored a broken version of tk on that platform?

Maybe someone with the oldest python and MacOS matplotlib supports could verify the terminal and the canvas are both responsive after removing the callback