message: http1: remove unimplemented constructor
  Removes a stale, unimplemented constructor definition.
  Risk Level: low
  Testing: n/a
  Doc Changes: n/a
  Release Notes: n/a
diff: @@ -314,10 +314,6 @@ public:
  ServerConnectionCallbacks& callbacks, Http1Settings settings,
  uint32_t max_request_headers_kb);
  - ServerConnectionImpl(Network::Connection& connection, ServerConnectionCallbacks& callbacks,
  - Http1Settings settings, uint32_t max_request_headers_kb,
  - bool strict_header_validation);
  -
  bool supports_http_10() override { return codec_settings_.accept_http_10_; }
  private:
  