Thanks for grabbing this, it's been on my radar for a bit but I kept forgetting, and now I can continue forgetting about it!!
Clean up some of the 3.0 API notes
Review Request #2758 — Created Oct. 31, 2023 and submitted
There's no need for the Added section, as that's covered by
Since: 3.0.0tags. And several of the entries are outdated.
Also, remove all docs about the individual headers as only the single header is allowed now.