Revert of Add functionality which limits the number of bytes on the network.

webrtc/modules/remote_bitrate_estimator/include/send_time_history.h

Index: webrtc/modules/remote_bitrate_estimator/include/send_time_history.h
diff --git a/webrtc/modules/remote_bitrate_estimator/include/send_time_history.h b/webrtc/modules/remote_bitrate_estimator/include/send_time_history.h
index bc3b8ccac0109d5d4a4ab5e6d71c302723532d33..026670acbf3c0c11a2c68ad227d90d1f43a4ff3b 100644
--- a/webrtc/modules/remote_bitrate_estimator/include/send_time_history.h
+++ b/webrtc/modules/remote_bitrate_estimator/include/send_time_history.h
@@ -38,15 +38,11 @@
   // thus be non-null and have the sequence_number field set.
   bool GetFeedback(PacketFeedback* packet_feedback, bool remove);
 
-  size_t GetOutstandingBytes(uint16_t local_net_id,
-                             uint16_t remote_net_id) const;
-
  private:
   const Clock* const clock_;
   const int64_t packet_age_limit_ms_;
   SequenceNumberUnwrapper seq_num_unwrapper_;
   std::map<int64_t, PacketFeedback> history_;
-  rtc::Optional<int64_t> latest_acked_seq_num_;
 
   RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(SendTimeHistory);
 };