[Checkins] [zopefoundation/RestrictedPython] c7a90b: There's no Python 3.8 on Appveyor (#148)

[Marius Gedminas]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/RestrictedPython
  Commit: c7a90b46c9dabe6da135434da9d694e673d93c42
      https://github.com/zopefoundation/RestrictedPython/commit/c7a90b46c9dabe6da135434da9d694e673d93c42
  Author: Marius Gedminas <marius at gedmin.as>
  Date:   2019-02-07 (Thu, 07 Feb 2019)

  Changed paths:
    M appveyor.yml

  Log Message:
  -----------
  There's no Python 3.8 on Appveyor (#148)

* There's no Python 3.8 on Appveyor

https://www.appveyor.com/docs/windows-images-software/#python does not
list Python 3.8 as an available version.

Having it listed in appveyor.yml confuses tools like my
check-python-versions, as they detect an inconsistency between supported
Python versions listed in appveyor.yml with those listed eg. in
setup.py.

* Simplify appveyor.yml

I don't know what these PROFILE/PYTHON_VERSION environment variables are
supposed to be (or why PYTHON_VERSION is 3.6 for three different values
of PROFILE=py3{5,6,7}-conventions), but python -V reports the same "2.7.15"
version for all four of these jobs.

I see no reason to run the same set of tox jobs on the same Python
version four times (while incorrectly claiming they use different Python
versions).