CLN: FIXMEs
- [ ] closes #xxxx
- [ ] tests added / passed
- [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them
- [ ] whatsnew entry

CI fail is from the lint issue fixed on master a little while ago One that i'll need some help figuring out how to make actionable: https://github.com/pandas-dev/pandas/blob/master/pandas/plotting/_matplotlib/timeseries.py#L231