Remove Thomas Boch from votable

[pllim]

This pull request is to remove Thomas Boch from astropy.io.votable subpackage maintenance given #740 (comment) and private communications. We're sorry to see you go and hope you would have time to rejoin in the future.

Given the wordings in https://github.com/astropy/astropy-project/blob/main/messages/role_annoucement.md , I don't think this needs a notice to astropy-dev nor a two-week comment period, @astropy/coordinators ?

[eteq]

I agree it is not formally necessary, but I personally would prefer to wait on this and do all the votable updates in one big block. I'd also like to just make sure @tboch agrees (the comment was pretty clear in #740 (comment) so if need be we can go with that, but an explicit "yes I'm ok being dropped as maintainer" would be nice if possible)

[tboch]

I agree it is not formally necessary, but I personally would prefer to wait on this and do all the votable updates in one big block. I'd also like to just make sure @tboch agrees (the comment was pretty clear in #740 (comment) so if need be we can go with that, but an explicit "yes I'm ok being dropped as maintainer" would be nice if possible)

Yes, I'm fine with this PR, and being removed from votable

[eteq]

Two weeks have passed so I'll go ahead and merge this. Thanks all for the care and honesty!