[Checkins] [zopefoundation/Zope] 5c83c2: - no reason to lint on both Python 2.7 and 3.6

[Jens Vagelpohl]

  Branch: refs/heads/jens_clean_tests
  Home:   https://github.com/zopefoundation/Zope
  Commit: 5c83c2083875de6b1d960be0c8dedbbfe39d7330
      https://github.com/zopefoundation/Zope/commit/5c83c2083875de6b1d960be0c8dedbbfe39d7330
  Author: Jens Vagelpohl <jens at netz.ooo>
  Date:   2019-02-10 (Sun, 10 Feb 2019)

  Changed paths:
    M .travis.yml
    M tox.ini

  Log Message:
  -----------
  - no reason to lint on both Python 2.7 and 3.6