ANN: Please migrate away from pytest-openfiles

Hello. The Astropy Project has decided to retire pytest-openfiles, a plugin to detect open files in pytest runs. We see that you are using it in this repo. While you may continue to use it, please be advised that it will no longer be maintained going forward. See https://github.com/astropy/pytest-openfiles#important-retirement-roadmap for more information. We apologize for any inconvenienced cause.

If this issue was opened in error and is irrelevant, feel free to close.

Thank you for your patience.

xref https://github.com/astropy/pytest-openfiles/issues/47

Start by inspecting the repository's pytest configuration and dependency files for pytest-openfiles, then read the linked pytest-openfiles retirement roadmap. Determine whether the plugin can be removed or needs a replacement, and run the existing test suite to confirm it no longer depends on the retired plugin.

Written by the indexing model from the issue text.