rustdoc: Strip out additional chrome (#13172)

This PR updates the HTML to Markdown converter for rustdoc to strip out
some additional chrome.

Namely, anchors and links to source files.

Release Notes:

- N/A
7aa28c9b24Marshall Bowers committed on 6/17/2024, 8:44:15 PM· committed by GitHubparentbb1d52b
1 file changedLine totals unavailable