Replace broken type annotations with type comments

[Vlad-Shcherbina]

Fixes #3826.

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Checklist

• Create a new changelog file in the changelog folder, with a name like <ISSUE NUMBER>.<TYPE>.rst. See changelog/README.rst for details.
• Target the master branch for bug fixes, documentation updates and trivial changes.
• (N/A) Target the features branch for new features and removals/deprecations.
• (N/A) Include documentation when adding new features.
• (N/A???) Include new tests or update existing tests when applicable.

Unless your change is trivial or a small documentation fix (e.g., a typo or reword of a small section) please:

• (N/A) Add yourself to AUTHORS in alphabetical order;

[coveralls]

Coverage increased (+0.05%) to 92.586% when pulling c3e494f on Vlad-Shcherbina:funcfixtureinfo-type-hints into 7d4c4c6 on pytest-dev:master.