Delete SetRtcpXrRrtrStatus, make it a construction-time setting

Bug: None
Change-Id: If2c42af6038c2ce1dc4289b949a0a3a279bae1b9
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/195337
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Reviewed-by: Åsa Persson <asapersson@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32754}

modules/rtp_rtcp/source/rtp_rtcp_impl2.h

@@ -234,9 +234,6 @@ class ModuleRtpRtcpImpl2 final : public RtpRtcpInterface,
   void SendCombinedRtcpPacket(
       std::vector<std::unique_ptr<rtcp::RtcpPacket>> rtcp_packets) override;
 
-  // (XR) Receiver reference time report.
-  void SetRtcpXrRrtrStatus(bool enable) override;
-
   // Video part.
   int32_t SendLossNotification(uint16_t last_decoded_seq_num,
                                uint16_t last_received_seq_num,
@@ -291,9 +288,6 @@ class ModuleRtpRtcpImpl2 final : public RtpRtcpInterface,
   // Returns true if the module is configured to store packets.
   bool StorePackets() const;
 
-  // Returns current Receiver Reference Time Report (RTTR) status.
-  bool RtcpXrRrtrStatus() const;
-
   TaskQueueBase* const worker_queue_;
   RTC_NO_UNIQUE_ADDRESS SequenceChecker process_thread_checker_;