RFC: removal of share/doc/{papers,psd,smm,usd} in 2 months

[Brett]

> > those roff sources have been very naughty and will be removed from the
> > tree by the end of the year.
> ...
> > Should people feel strongly about them, we might be able to move them
> > over to the doc repository.
> 
> This does not seem a "RFC" -- this sounds more like you or a cabal
> already made the decision.
> 

"you or a cabal already made the decision" ... that sounds exactly like an RFC to me. :-)