message: Remove mentioning of quic/tools from public README
  Summary: The files have been removed
diff: - `quic/logging`: Implementation of logging framework
  - `quic/happyeyeballs`: Implementation of mechanism to race IPV4 and IPV6 connection and pick a winner
  - `quic/state`: Defines and implements both connection and stream level state artifacts and state machines
  -- `quic/tools`: Implementation of tools such as one to trace transport events within a connection
  - `quic/sample`: Example client and server
  