[Checkins] [zopefoundation/zope.interface] a278bf: Proposal: The custom has is not needed.

[Jens W. Klein]

  Branch: refs/heads/hash_performance_3
  Home:   https://github.com/zopefoundation/zope.interface
  Commit: a278bfd07f7b50d3e2b3ebee856f919f7af16a21
      https://github.com/zopefoundation/zope.interface/commit/a278bfd07f7b50d3e2b3ebee856f919f7af16a21
  Author: Jens W. Klein <jk at kleinundpartner.at>
  Date:   2020-01-28 (Tue, 28 Jan 2020)

  Changed paths:
    M src/zope/interface/interface.py
    M src/zope/interface/tests/test_interface.py

  Log Message:
  -----------
  Proposal: The custom has is not needed.