naming: Remove dead code

This commit essentially undoes
https://vanadium-review.googlesource.com/#/c/1670
and
https://vanadium-review.googlesource.com/#/c/2971
because we have chosen a new approach (endpoints contain
the blessing names of the server) implemented in:
https://vanadium-review.googlesource.com/#/c/7730/

MultiPart: 2/4

Change-Id: Ieb6151a15e080b63c0108a376e940b0cab783a1c
18 files changed