Delete VCMJitterBuffer::UpdateRtt and related unused code

Bug: webrtc:7408
Change-Id: Ic4bd745ed36dd7f7d5eec6531e05204035a545fd
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/133188
Reviewed-by: Philip Eliasson <philipel@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27648}
diff --git a/modules/video_coding/jitter_buffer.cc b/modules/video_coding/jitter_buffer.cc
index c9314f3..51e828f 100644
--- a/modules/video_coding/jitter_buffer.cc
+++ b/modules/video_coding/jitter_buffer.cc
@@ -128,7 +128,6 @@
       num_duplicated_packets_(0),
       jitter_estimate_(clock),
       inter_frame_delay_(clock_->TimeInMilliseconds()),
-      rtt_ms_(kDefaultRtt),
       missing_sequence_numbers_(SequenceNumberLessThan()),
       latest_received_sequence_number_(0),
       max_nack_list_size_(0),
@@ -169,7 +168,6 @@
   waiting_for_completion_.timestamp = 0;
   waiting_for_completion_.latest_packet_time = -1;
   first_packet_since_reset_ = true;
-  rtt_ms_ = kDefaultRtt;
   last_decoded_state_.Reset();
 
   decodable_frames_.Reset(&free_frames_);
@@ -434,7 +432,7 @@
   VCMFrameBufferStateEnum previous_state = frame->GetState();
   // Insert packet.
   FrameData frame_data;
-  frame_data.rtt_ms = rtt_ms_;
+  frame_data.rtt_ms = kDefaultRtt;
   frame_data.rolling_average_packets_per_frame = average_packets_per_frame_;
   VCMFrameBufferEnum buffer_state =
       frame->InsertPacket(packet, now_ms, frame_data);
@@ -587,12 +585,6 @@
   return jitter_estimate_.GetJitterEstimate(rtt_mult);
 }
 
-void VCMJitterBuffer::UpdateRtt(int64_t rtt_ms) {
-  rtc::CritScope cs(&crit_sect_);
-  rtt_ms_ = rtt_ms;
-  jitter_estimate_.UpdateRtt(rtt_ms);
-}
-
 void VCMJitterBuffer::SetNackSettings(size_t max_nack_list_size,
                                       int max_packet_age_to_nack,
                                       int max_incomplete_time_ms) {