meta: move inactive collaborators to emeriti

I sent an email to inactive collaborators (in the previous 6 months at the time, no commits, no PRs reviewed, and no commits landed) asking if it was time to move to emeritus.

Some replied affirmatively and I have moved those people to emeritus.

Others replied indicating a desire to remain collaborators, and I left them as collaborators.

The remaining folks are being moved to emeritus in this change.

@claudiorodriguez @iarna @italoacasas @MoonBall @rubys @seishun @trevnorris If any of you wish to remain collaborators for any reason whatsoever, just let me know in the next 72 hours and I'll remove you from this PR. (You don't even have to tell me what the reason is. Leave a comment here or send me an email.)

Thanks for all the great contributions and collaboration over the years!

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• documentation is changed or added
• commit message follows commit guidelines