message: Remove outdated comment in ClientHandshakeFactory
  Summary:
  The reference is not passed down anymore, so warning about it is moot.
  Pull Request resolved:
diff: @@ -21,9 +21,6 @@ class ClientHandshakeFactory {
  /**
  * Construct a new client handshake.
  - * /!\ The ClientHandshake constructed might keep a reference to cryptoState.
  - * It is up to the caller to ensure the lifetime of cryptoState exceed the one
  - * of the ClientHandshake.
  */
  virtual std::unique_ptr<ClientHandshake> makeClientHandshake(
  QuicClientConnectionState* conn) = 0;
  