Remove unnecessary interface TelephoneEventHandler

webrtc/modules/rtp_rtcp/include/rtp_receiver.h

Index: webrtc/modules/rtp_rtcp/include/rtp_receiver.h
diff --git a/webrtc/modules/rtp_rtcp/include/rtp_receiver.h b/webrtc/modules/rtp_rtcp/include/rtp_receiver.h
index 9db1c63da78976d554d8530e916f017cf99a66be..c04a173ff4acafc180053c06ab423a8386610336 100644
--- a/webrtc/modules/rtp_rtcp/include/rtp_receiver.h
+++ b/webrtc/modules/rtp_rtcp/include/rtp_receiver.h
@@ -18,21 +18,6 @@ namespace webrtc {
 
 class RTPPayloadRegistry;
 
-class TelephoneEventHandler {
- public:
-  virtual ~TelephoneEventHandler() {}
-
-  // The following three methods implement the TelephoneEventHandler interface.
-  // Forward DTMFs to decoder for playout.
-  virtual void SetTelephoneEventForwardToDecoder(bool forward_to_decoder) = 0;
-
-  // Is forwarding of outband telephone events turned on/off?
-  virtual bool TelephoneEventForwardToDecoder() const = 0;
-
-  // Is TelephoneEvent configured with payload type payload_type
-  virtual bool TelephoneEventPayloadType(const int8_t payload_type) const = 0;
-};
-
 class RtpReceiver {
  public:
   // Creates a video-enabled RTP receiver.
@@ -51,9 +36,6 @@ class RtpReceiver {
 
   virtual ~RtpReceiver() {}
 
-  // Returns a TelephoneEventHandler if available.
-  virtual TelephoneEventHandler* GetTelephoneEventHandler() = 0;
-
   // Registers a receive payload in the payload registry and notifies the media
   // receiver strategy.
   virtual int32_t RegisterReceivePayload(