diff --git a/media/base/media_channel.h b/media/base/media_channel.h
index de7024e1b9..9749cd0568 100644
--- a/media/base/media_channel.h
+++ b/media/base/media_channel.h
@@ -385,8 +385,8 @@ struct MediaSenderInfo {
   std::vector<SsrcReceiverInfo> remote_stats;
   // A snapshot of the most recent Report Block with additional data of interest
   // to statistics. Used to implement RTCRemoteInboundRtpStreamStats. Within
-  // this list, the ReportBlockData::RTCPReportBlock::source_ssrc(), which is
-  // the SSRC of the corresponding outbound RTP stream, is unique.
+  // this list, the `ReportBlockData::source_ssrc()`, which is the SSRC of the
+  // corresponding outbound RTP stream, is unique.
   std::vector<webrtc::ReportBlockData> report_block_datas;
   absl::optional<bool> active;
   // https://w3c.github.io/webrtc-stats/#dom-rtcoutboundrtpstreamstats-totalpacketsenddelay
diff --git a/modules/congestion_controller/rtp/transport_feedback_adapter_unittest.cc b/modules/congestion_controller/rtp/transport_feedback_adapter_unittest.cc
index 14a2b13831..5aad74c46e 100644
--- a/modules/congestion_controller/rtp/transport_feedback_adapter_unittest.cc
+++ b/modules/congestion_controller/rtp/transport_feedback_adapter_unittest.cc
@@ -98,12 +98,6 @@ class TransportFeedbackAdapterTest : public ::testing::Test {
   virtual void TearDown() { adapter_.reset(); }
 
  protected:
-  void OnReceivedEstimatedBitrate(uint32_t bitrate) {}
-
-  void OnReceivedRtcpReceiverReport(const ReportBlockList& report_blocks,
-                                    int64_t rtt,
-                                    int64_t now_ms) {}
-
   void OnSentPacket(const PacketResult& packet_feedback) {
     RtpPacketSendInfo packet_info;
     packet_info.media_ssrc = kSsrc;
diff --git a/modules/rtp_rtcp/include/rtp_rtcp_defines.h b/modules/rtp_rtcp/include/rtp_rtcp_defines.h
index ce39006ce8..26126e3567 100644
--- a/modules/rtp_rtcp/include/rtp_rtcp_defines.h
+++ b/modules/rtp_rtcp/include/rtp_rtcp_defines.h
@@ -13,7 +13,6 @@
 
 #include <stddef.h>
 
-#include <list>
 #include <memory>
 #include <vector>
 
@@ -125,20 +124,6 @@ enum RtxMode {
 
 const size_t kRtxHeaderSize = 2;
 
-struct RTCPReportBlock {
-  // Fields as described by RFC 3550 6.4.2.
-  uint32_t sender_ssrc = 0;  // SSRC of sender of this report.
-  uint32_t source_ssrc = 0;  // SSRC of the RTP packet sender.
-  uint8_t fraction_lost = 0;
-  int32_t packets_lost = 0;  // 24 bits valid.
-  uint32_t extended_highest_sequence_number = 0;
-  uint32_t jitter = 0;
-  uint32_t last_sender_report_timestamp = 0;
-  uint32_t delay_since_last_sender_report = 0;
-};
-
-typedef std::list<RTCPReportBlock> ReportBlockList;
-
 struct RtpState {
   uint16_t sequence_number = 0;
   uint32_t start_timestamp = 0;
diff --git a/modules/rtp_rtcp/source/rtp_rtcp_impl.h b/modules/rtp_rtcp/source/rtp_rtcp_impl.h
index 178c6b00ae..50937f574d 100644
--- a/modules/rtp_rtcp/source/rtp_rtcp_impl.h
+++ b/modules/rtp_rtcp/source/rtp_rtcp_impl.h
@@ -184,8 +184,8 @@ class ABSL_DEPRECATED("") ModuleRtpRtcpImpl
 
   // A snapshot of the most recent Report Block with additional data of
   // interest to statistics. Used to implement RTCRemoteInboundRtpStreamStats.
-  // Within this list, the ReportBlockData::RTCPReportBlock::source_ssrc(),
-  // which is the SSRC of the corresponding outbound RTP stream, is unique.
+  // Within this list, the `ReportBlockData::source_ssrc()`, which is the SSRC
+  // of the corresponding outbound RTP stream, is unique.
   std::vector<ReportBlockData> GetLatestReportBlockData() const override;
   absl::optional<SenderReportStats> GetSenderReportStats() const override;
   // Round trip time statistics computed from the XR block contained in the last
diff --git a/modules/rtp_rtcp/source/rtp_rtcp_impl2.h b/modules/rtp_rtcp/source/rtp_rtcp_impl2.h
index d6ffd8a9df..1e11713ece 100644
--- a/modules/rtp_rtcp/source/rtp_rtcp_impl2.h
+++ b/modules/rtp_rtcp/source/rtp_rtcp_impl2.h
@@ -196,8 +196,8 @@ class ModuleRtpRtcpImpl2 final : public RtpRtcpInterface,
 
   // A snapshot of the most recent Report Block with additional data of
   // interest to statistics. Used to implement RTCRemoteInboundRtpStreamStats.
-  // Within this list, the ReportBlockData::RTCPReportBlock::source_ssrc(),
-  // which is the SSRC of the corresponding outbound RTP stream, is unique.
+  // Within this list, the `ReportBlockData::source_ssrc()`, which is the SSRC
+  // of the corresponding outbound RTP stream, is unique.
   std::vector<ReportBlockData> GetLatestReportBlockData() const override;
   absl::optional<SenderReportStats> GetSenderReportStats() const override;
   absl::optional<NonSenderRttStats> GetNonSenderRttStats() const override;