video_coding: Removing compiler warnings

Review URL: http://webrtc-codereview.appspot.com/88010

git-svn-id: http://webrtc.googlecode.com/svn/trunk@274 4adac7df-926f-26a2-2b94-8c16560cd09d

src/modules/video_coding/main/source/receiver.cc

@@ -108,7 +108,6 @@ VCMReceiver::InsertPacket(const VCMPacket& packet,
                        MaskWord64ToUWord32(VCMTickTime::MillisecondTimestamp()));
         }
 
-        const bool emptyFrame = (buffer->Length() == 0);
         const WebRtc_Word64 nowMs = VCMTickTime::MillisecondTimestamp();
 
         WebRtc_Word64 renderTimeMs = _timing.RenderTimeMs(packet.timestamp, nowMs);