Removed server:prod

Javascript builds now generate a fully functional web client, code
reviews no longer require a user downloads the source to run it locally.
Furthermore, using the new configuration mechanism against prod requires
that the production server permit localhost:9000 as a CORS origin,
which it currently does not. Removing server:prod because we don't
really need it anymore.

Change-Id: Id2a57870fcf97eff9da5ec168197e616a1e35e1d
Merge "Removed server:prod"