Would it make sense to make some disclosure of "it's not coming back and no PRs adding similar functionality will be entertained for this reason?"

Additionally, it seemed like this page[1] (discussed previously[2]) details some reasons why some publicly visible source code projects should be able to include code that implements things otherwise under export control.

[1] https://www.unr.edu/sponsored-projects/compliance/export-con...

[2] https://news.ycombinator.com/item?id=40041198