Remove flake8-plugin-utils stubs (not before ?)
A py.typed file was just added: https://github.com/afonasev/flake8-plugin-utils/pull/78
There's been no release since. We can remove this six months after a release with py.typed.
For others coming to this in the future,
flake8-plugin-utils was last released on May 5, 2021 per https://pypi.org/project/flake8-plugin-utils/#history while the referenced pull request was submitted on December 6, 2021 and merged on January 13, 2022.
Released: https://github.com/afonasev/flake8-plugin-utils/pull/78
A small bug in stubsabot was the reason why we didn't get an automated PR to mark these stubs as obsolete last night:
- #10368
Marked as obsolete in #10373 🎉