"veyron/services/wsprd": Kill old security model

This CL removes all security primitives from the old security
model from wsprd/.... After this CL, WSPR will only use the
new security model.

All JS code has been changed to use the new security model with
CL: https://veyron-review.googlesource.com/#/c/5829/

Change-Id: Ied6fdabfc6f768d50758d821aca3b305f9ab1db9
13 files changed
tree: 047d1783dd3b9351e1f269dc964eb8ea70c68551
  1. services/