CLN: enforce deprecation of the Series[categorical].replace special-casing
xref #56385

enforced deprecation of the behavior of `DataFrame.replace` and `Series.replace` with `CategoricalDtype`
This pull request is stale because it has been open for thirty days with no activity. Please [update](https://pandas.pydata.org/pandas-docs/stable/development/contributing.html#updating-your-pull-request) and respond to this comment if you're still interested in working on this. Thanks for starting this @natmokval 