Removing echo warning because it seems to be flooding the logs

anytime there is any echo. Secondly, this should be treated as
a warning in the sense that echo in the signal does not mean
something is wrong with the engine.f
Review URL: http://webrtc-codereview.appspot.com/139018

git-svn-id: http://webrtc.googlecode.com/svn/trunk@572 4adac7df-926f-26a2-2b94-8c16560cd09d

src/voice_engine/main/source/transmit_mixer.cc

@@ -1362,12 +1362,6 @@ WebRtc_Word32 TransmitMixer::APMProcessStream(
                    "message has been posted for callback");
     }
 
-    if (_audioProcessingModulePtr->echo_cancellation()->stream_has_echo())
-    {
-        WEBRTC_TRACE(kTraceWarning, kTraceVoice, VoEId(_instanceId, -1),
-                   "AudioProcessingModule notification: Echo");
-    }
-
     return 0;
 }