Update dependencies
Add group information to admins list.
More formally make the website an optional signup field.

This had already been the case on the gsa branch, and is the approach we
want as the default going forward.
Remove defunct static site deployer hook.

This never actually worked and wasn't being used. We're handling the
deployment of the static site differently now anyway.
Get rid of unused api end points.

These endpoints were never publicized, but the "validate" api is still
being hit by once user. We should migrate that toward the v1/users
controller eventually, but this at least begins the cleanup and
de-duplication.