RTPReceiverAudio: Removed frequency from CNGPayloadType and cleaned up

webrtc/modules/rtp_rtcp/source/rtp_receiver_video.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 90 matching lines @@
   rtp_header->type.Video.playout_delay =
       rtp_header->header.extension.playout_delay;
 
   return data_callback_->OnReceivedPayloadData(parsed_payload.payload,
                                                parsed_payload.payload_length,
                                                rtp_header) == 0
              ? 0
              : -1;
 }
 
-int RTPReceiverVideo::GetPayloadTypeFrequency() const {
-  return kVideoPayloadTypeFrequency;
-}
-
 RTPAliveType RTPReceiverVideo::ProcessDeadOrAlive(
     uint16_t last_payload_length) const {
   return kRtpDead;
 }
 
 int32_t RTPReceiverVideo::InvokeOnInitializeDecoder(
     RtpFeedback* callback,
     int8_t payload_type,
     const char payload_name[RTP_PAYLOAD_NAME_SIZE],
     const PayloadUnion& specific_payload) const {
   // TODO(pbos): Remove as soon as audio can handle a changing payload type
   // without this callback.
   return 0;
 }
 
 }  // namespace webrtc