dir/server: remove deprecated TODOs
dir/server: remove deprecated TODOs

Change-Id: I79deecf32ca428f98e61aeed92b9d9f8cd3ecb3b
Reviewed-on: https://upspin-review.googlesource.com/11020
Reviewed-by: David Presotto <d244755566b06d4c956c05eb7fe29c9fb345f41e@gmail.com>
Reviewed-by: Andrew Gerrand <395a7d33bec8475c9b83b7d440f141bcbd994aa5@golang.org>

upspin/upspin,upspin/upspin