[Checkins] [zopefoundation/RestrictedPython] 64db0c: Drop support for long-deprecated 'sets' module.

[GitHub]

  Branch: refs/heads/drop-sets-module-support
  Home:   https://github.com/zopefoundation/RestrictedPython
  Commit: 64db0c0e819483fd1c478aa4eb58b93b8818dc5c
      https://github.com/zopefoundation/RestrictedPython/commit/64db0c0e819483fd1c478aa4eb58b93b8818dc5c
  Author: Tres Seaver <tseaver at palladion.com>
  Date:   2017-05-23 (Tue, 23 May 2017)

  Changed paths:
    M docs/CHANGES.rst
    M src/RestrictedPython/Utilities.py
    M tests/builtins/test_utilities.py

  Log Message:
  -----------
  Drop support for long-deprecated 'sets' module.