message: remove unused ClientImpl::report_event_loop_metrics()
diff: @@ -64,7 +64,6 @@ public:
  using OutputBuffer = util::ResettableExpandableBufferOutputStream;
  using ClientProtocol = _impl::ClientProtocol;
  using ClientResetOperation = _impl::ClientResetOperation;
  - using EventLoopMetricsHandler = util::network::Service::EventLoopMetricsHandler;
  /// Per-server endpoint information used to determine reconnect delays.
  class ReconnectInfo {
  @@ -122,11 +121,9 @@ public:
  static constexpr int get_oldest_supported_protocol_version() noexcept;
  // @{
  - /// These call stop(), run(), and report_event_loop_metrics() on the service
  - /// object (get_service()) respectively.
  + /// These call stop() and run() on the service object (get_service()) respectively.
  void stop() noexcept;
  void run();
  - void report_event_loop_metrics(std::function<EventLoopMetricsHandler>);
  // @}
  const std::string& get_user_agent_string() const noexcept;
  @@ -1126,11 +1123,6 @@ private:
  // Implementation
  -inline void ClientImpl::report_event_loop_metrics(std::function<EventLoopMetricsHandler> handler)
  -{
  - m_service.report_event_loop_metrics(std::move(handler)); // Throws
  -}
  -
  inline const std::string& ClientImpl::get_user_agent_string() const noexcept
  {
  return m_user_agent_string;
  