[Checkins] [zopefoundation/RestrictedPython] d42b8b: `transform_slice` not necessary for Python 3.9+

[Dieter Maurer]

  Branch: refs/heads/fix-193
  Home:   https://github.com/zopefoundation/RestrictedPython
  Commit: d42b8b4bd52768eb6640c216fc6485bfa9196c25
      https://github.com/zopefoundation/RestrictedPython/commit/d42b8b4bd52768eb6640c216fc6485bfa9196c25
  Author: dieter <dieter at handshake.de>
  Date:   2020-04-01 (Wed, 01 Apr 2020)

  Changed paths:
    M src/RestrictedPython/transformer.py

  Log Message:
  -----------
  `transform_slice` not necessary for Python 3.9+