Remove cs(4) from the release notes template, and release notes
for versions which no longer shipped with cs(4).

I discovered this while testing the 14.2 hardware notes. Afaict from man.freebsd.org, this driver existed in 4.5, and didn't exist in 4.6. I'm having trouble finding it in the commit logs and would love any tips on this to further this type of work. To be clear, that being cleaning up current (upcoming) release notes and just making sure to dot my I's.

I did these by hand so it didn't get messed up.

Collin, since you said we could remove bogus entries, if strictly scoped to that plan, should I request your review or just tag you as a subscriber saying e.g. Ok cperciva (implicit)?

I built the website with make, and then looked at some of the hardware release notes in firefox. Since X-Jack is immediately after this in the old ones, I CTRL-Fed in a few of them to make sure nothing looks different than the others where I removed them.