[cleanup] Remove unused fields/functions from rtcp module.

webrtc/modules/rtp_rtcp/source/rtcp_receiver.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 50 matching lines @@
           CriticalSectionWrapper::CreateCriticalSection()),
       main_ssrc_(0),
       _remoteSSRC(0),
       _remoteSenderInfo(),
       _lastReceivedSRNTPsecs(0),
       _lastReceivedSRNTPfrac(0),
       _lastReceivedXRNTPsecs(0),
       _lastReceivedXRNTPfrac(0),
       xr_rr_rtt_ms_(0),
       _receivedInfoMap(),
-      _packetTimeOutMS(0),
       _lastReceivedRrMs(0),
       _lastIncreasedSequenceNumberMs(0),
       stats_callback_(NULL),
       packet_type_counter_observer_(packet_type_counter_observer),
       num_skipped_packets_(0),
       last_skipped_packets_warning_(clock->TimeInMilliseconds()) {
   memset(&_remoteSenderInfo, 0, sizeof(_remoteSenderInfo));
 }
 
 RTCPReceiver::~RTCPReceiver() {
@@ skipping 1364 matching lines @@
         return -1;
       }
       num += receiveInfo->TmmbrSet.lengthOfSet();
       receiveInfoIt++;
     }
   }
   return num;
 }
 
 }  // namespace webrtc