Don't append the bitrate twice to the outgoing bitrate plot in event_log_visualizer.

rtc_tools/event_log_visualizer/analyzer.cc

 /*
  *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 1012 matching lines @@
         result_series.points.emplace_back(x, y);
       }
     }
 
     if (show_detector_state) {
       plot->AppendIntervalSeries(std::move(overusing_series));
       plot->AppendIntervalSeries(std::move(underusing_series));
       plot->AppendIntervalSeries(std::move(normal_series));
     }
 
-    plot->AppendTimeSeries(std::move(bitrate_series));
     plot->AppendTimeSeries(std::move(loss_series));
     plot->AppendTimeSeries(std::move(delay_series));
     plot->AppendTimeSeries(std::move(created_series));
     plot->AppendTimeSeries(std::move(result_series));
   }
 
   // Overlay the incoming REMB over the outgoing bitrate
   // and outgoing REMB over incoming bitrate.
   PacketDirection remb_direction =
       desired_direction == kOutgoingPacket ? kIncomingPacket : kOutgoingPacket;
@@ skipping 685 matching lines @@
     plot->AppendTimeSeries(std::move(series.second));
   }
 
   plot->SetXAxis(0, call_duration_s_, "Time (s)", kLeftMargin, kRightMargin);
   plot->SetYAxis(min_y_axis, max_y_axis, "Relative delay (ms)", kBottomMargin,
                  kTopMargin);
   plot->SetTitle("NetEq timing");
 }
 }  // namespace plotting
 }  // namespace webrtc