Remove logging of unused and deprecated PeerConnection::Observer callbacks

remoting/host/cast_extension_session.cc

Index: remoting/host/cast_extension_session.cc
diff --git a/remoting/host/cast_extension_session.cc b/remoting/host/cast_extension_session.cc
index 4cd3dc4027c9fe93c1627055c68703bc6324e795..f9c6bb6e4b9ee2b254d42e5ae25b22280c8a4a94 100644
--- a/remoting/host/cast_extension_session.cc
+++ b/remoting/host/cast_extension_session.cc
@@ -577,11 +577,6 @@ void CastExtensionSession::OnSignalingChange(
   VLOG(1) << "PeerConnectionObserver: SignalingState changed to:" << new_state;
 }
 
-void CastExtensionSession::OnStateChange(
-    webrtc::PeerConnectionObserver::StateType state_changed) {
-  VLOG(1) << "PeerConnectionObserver: StateType changed to: " << state_changed;
-}
-
 void CastExtensionSession::OnAddStream(webrtc::MediaStreamInterface* stream) {
   VLOG(1) << "PeerConnectionObserver: stream added: " << stream->label();
 }
@@ -623,10 +618,6 @@ void CastExtensionSession::OnIceGatheringChange(
           << new_state;
 }
 
-void CastExtensionSession::OnIceComplete() {
-  VLOG(1) << "PeerConnectionObserver: all ICE candidates found.";
-}
-
 void CastExtensionSession::OnIceCandidate(
     const webrtc::IceCandidateInterface* candidate) {
   std::string candidate_str;