Message 183706 - Python tracker

Doc/make.bat assumes that this issue has already been resolved:
  if "%PYTHON%" EQU "" set PYTHON=..\pcbuild\python
Even with '_d' appended, as it should be, that does not work for 3.x.
I think that line should be @rem'ed out until it does work.
Does anyone mind if I do so?

I already suggested on #15605 that a workaround be given until it is no longer needed.