diff --git a/call/rtp_transport_controller_send.cc b/call/rtp_transport_controller_send.cc
index f206057e68..7e447c547c 100644
--- a/call/rtp_transport_controller_send.cc
+++ b/call/rtp_transport_controller_send.cc
@@ -93,10 +93,6 @@ void RtpTransportControllerSend::RegisterNetworkObserver(
     NetworkChangedObserver* observer) {
   send_side_cc_->RegisterNetworkObserver(observer);
 }
-void RtpTransportControllerSend::DeRegisterNetworkObserver(
-    NetworkChangedObserver* observer) {
-  send_side_cc_->DeRegisterNetworkObserver(observer);
-}
 void RtpTransportControllerSend::OnNetworkRouteChanged(
     const std::string& transport_name,
     const rtc::NetworkRoute& network_route) {
diff --git a/call/rtp_transport_controller_send.h b/call/rtp_transport_controller_send.h
index 484748fff9..c909511386 100644
--- a/call/rtp_transport_controller_send.h
+++ b/call/rtp_transport_controller_send.h
@@ -56,7 +56,6 @@ class RtpTransportControllerSend : public RtpTransportControllerSendInterface {
   void DeRegisterPacketFeedbackObserver(
       PacketFeedbackObserver* observer) override;
   void RegisterNetworkObserver(NetworkChangedObserver* observer) override;
-  void DeRegisterNetworkObserver(NetworkChangedObserver* observer) override;
   void OnNetworkRouteChanged(const std::string& transport_name,
                              const rtc::NetworkRoute& network_route) override;
   void OnNetworkAvailability(bool network_available) override;
diff --git a/call/rtp_transport_controller_send_interface.h b/call/rtp_transport_controller_send_interface.h
index cc890860d6..2c49889bc5 100644
--- a/call/rtp_transport_controller_send_interface.h
+++ b/call/rtp_transport_controller_send_interface.h
@@ -90,7 +90,6 @@ class RtpTransportControllerSendInterface {
   virtual void DeRegisterPacketFeedbackObserver(
       PacketFeedbackObserver* observer) = 0;
   virtual void RegisterNetworkObserver(NetworkChangedObserver* observer) = 0;
-  virtual void DeRegisterNetworkObserver(NetworkChangedObserver* observer) = 0;
   virtual void OnNetworkRouteChanged(
       const std::string& transport_name,
       const rtc::NetworkRoute& network_route) = 0;
diff --git a/call/test/mock_rtp_transport_controller_send.h b/call/test/mock_rtp_transport_controller_send.h
index 4870007cb5..85c6e58221 100644
--- a/call/test/mock_rtp_transport_controller_send.h
+++ b/call/test/mock_rtp_transport_controller_send.h
@@ -40,7 +40,6 @@ class MockRtpTransportControllerSend
   MOCK_METHOD1(RegisterPacketFeedbackObserver, void(PacketFeedbackObserver*));
   MOCK_METHOD1(DeRegisterPacketFeedbackObserver, void(PacketFeedbackObserver*));
   MOCK_METHOD1(RegisterNetworkObserver, void(NetworkChangedObserver*));
-  MOCK_METHOD1(DeRegisterNetworkObserver, void(NetworkChangedObserver*));
   MOCK_METHOD2(OnNetworkRouteChanged,
                void(const std::string&, const rtc::NetworkRoute&));
   MOCK_METHOD1(OnNetworkAvailability, void(bool));
diff --git a/modules/congestion_controller/include/send_side_congestion_controller.h b/modules/congestion_controller/include/send_side_congestion_controller.h
index 996d48dc54..9f2d0a6986 100644
--- a/modules/congestion_controller/include/send_side_congestion_controller.h
+++ b/modules/congestion_controller/include/send_side_congestion_controller.h
@@ -62,7 +62,7 @@ class SendSideCongestionController
   // try to break this circular chain of references, and make the observer a
   // construction time constant.
   void RegisterNetworkObserver(Observer* observer) override;
-  void DeRegisterNetworkObserver(Observer* observer) override;
+  virtual void DeRegisterNetworkObserver(Observer* observer);
 
   void SetBweBitrates(int min_bitrate_bps,
                       int start_bitrate_bps,
diff --git a/modules/congestion_controller/include/send_side_congestion_controller_interface.h b/modules/congestion_controller/include/send_side_congestion_controller_interface.h
index 9fdec832b1..4d64424fa7 100644
--- a/modules/congestion_controller/include/send_side_congestion_controller_interface.h
+++ b/modules/congestion_controller/include/send_side_congestion_controller_interface.h
@@ -46,7 +46,6 @@ class SendSideCongestionControllerInterface : public CallStatsObserver,
   virtual void DeRegisterPacketFeedbackObserver(
       PacketFeedbackObserver* observer) = 0;
   virtual void RegisterNetworkObserver(NetworkChangedObserver* observer) = 0;
-  virtual void DeRegisterNetworkObserver(NetworkChangedObserver* observer) = 0;
   virtual void SetBweBitrates(int min_bitrate_bps,
                               int start_bitrate_bps,
                               int max_bitrate_bps) = 0;
diff --git a/modules/congestion_controller/rtp/include/send_side_congestion_controller.h b/modules/congestion_controller/rtp/include/send_side_congestion_controller.h
index 489cc682fc..220800dcd2 100644
--- a/modules/congestion_controller/rtp/include/send_side_congestion_controller.h
+++ b/modules/congestion_controller/rtp/include/send_side_congestion_controller.h
@@ -76,7 +76,6 @@ class SendSideCongestionController
   // try to break this circular chain of references, and make the observer a
   // construction time constant.
   void RegisterNetworkObserver(NetworkChangedObserver* observer) override;
-  void DeRegisterNetworkObserver(NetworkChangedObserver* observer) override;
 
   void SetBweBitrates(int min_bitrate_bps,
                       int start_bitrate_bps,
diff --git a/modules/congestion_controller/rtp/send_side_congestion_controller.cc b/modules/congestion_controller/rtp/send_side_congestion_controller.cc
index 925fe32706..d2be85468e 100644
--- a/modules/congestion_controller/rtp/send_side_congestion_controller.cc
+++ b/modules/congestion_controller/rtp/send_side_congestion_controller.cc
@@ -117,7 +117,6 @@ class ControlHandler : public NetworkControllerObserver {
   void OnPacerQueueUpdate(PacerQueueUpdate msg);
 
   void RegisterNetworkObserver(NetworkChangedObserver* observer);
-  void DeRegisterNetworkObserver(NetworkChangedObserver* observer);
 
   rtc::Optional<TargetTransferRate> last_transfer_rate();
   bool pacer_configured();
@@ -208,13 +207,6 @@ void ControlHandler::RegisterNetworkObserver(NetworkChangedObserver* observer) {
   observer_ = observer;
 }
 
-void ControlHandler::DeRegisterNetworkObserver(
-    NetworkChangedObserver* observer) {
-  RTC_DCHECK_CALLED_SEQUENTIALLY(&sequenced_checker_);
-  RTC_DCHECK_EQ(observer_, observer);
-  observer_ = nullptr;
-}
-
 void ControlHandler::OnNetworkInvalidation() {
   if (!current_target_rate_msg_.has_value())
     return;
@@ -351,12 +343,6 @@ void SendSideCongestionController::RegisterNetworkObserver(
   });
 }
 
-void SendSideCongestionController::DeRegisterNetworkObserver(
-    NetworkChangedObserver* observer) {
-  WaitOnTask([this, observer]() {
-    control_handler->DeRegisterNetworkObserver(observer);
-  });
-}
 
 void SendSideCongestionController::SetBweBitrates(int min_bitrate_bps,
                                                   int start_bitrate_bps,