Removes redundant log warning in WebRtcAudioManager

webrtc/modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioManager.java

Index: webrtc/modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioManager.java
diff --git a/webrtc/modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioManager.java b/webrtc/modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioManager.java
index ae119fce1bcd23f2b43c67fdaa880eac5a595e49..f24e4708ee1974204739fdc3f1e4c33b0ccd53e6 100644
--- a/webrtc/modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioManager.java
+++ b/webrtc/modules/audio_device/android/java/src/org/webrtc/voiceengine/WebRtcAudioManager.java
@@ -110,8 +110,6 @@ public class WebRtcAudioManager {
           Logging.d(TAG, "VOICE_CALL stream volume: "
               + audioManager.getStreamVolume(AudioManager.STREAM_VOICE_CALL)
               + " (max=" + maxVoiceCallVolume + ")");
-        } else {
-          Logging.w(TAG, "Invalid audio mode: " + AUDIO_MODES[mode]);
         }
       }
     }