Delete unused methods of VCMJitterEstimator

ResetNackCount and UpdateMaxFrameSize were unused.

Bug: None
Change-Id: I314b3edce368ee3230bc3510e1bba520806d1493
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/134201
Reviewed-by: Philip Eliasson <philipel@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27789}

modules/video_coding/jitter_estimator.h

@@ -26,7 +26,6 @@ class VCMJitterEstimator {
 
   // Resets the estimate to the initial state.
   void Reset();
-  void ResetNackCount();
 
   // Updates the jitter estimate with the new data.
   //
@@ -58,8 +57,6 @@ class VCMJitterEstimator {
   //          - rttMs          : RTT in ms.
   void UpdateRtt(int64_t rttMs);
 
-  void UpdateMaxFrameSize(uint32_t frameSizeBytes);
-
   // A constant describing the delay from the jitter buffer to the delay on the
   // receiving side which is not accounted for by the jitter buffer nor the
   // decoding delay estimate.