Clean up the media stream audio track code

content/renderer/media/media_stream_audio_processor_options.cc

Index: content/renderer/media/media_stream_audio_processor_options.cc
diff --git a/content/renderer/media/media_stream_audio_processor_options.cc b/content/renderer/media/media_stream_audio_processor_options.cc
index 537ef908b14a9e65f0773a95e2948354c11815b2..5f99c921d3ff133f9a0223fe674838afb2edcb56 100644
--- a/content/renderer/media/media_stream_audio_processor_options.cc
+++ b/content/renderer/media/media_stream_audio_processor_options.cc
@@ -140,25 +140,6 @@ MediaAudioConstraints::MediaAudioConstraints(
 
 MediaAudioConstraints::~MediaAudioConstraints() {}
 
-// TODO(xians): Remove this method after the APM in WebRtc is deprecated.
-bool MediaAudioConstraints::NeedsAudioProcessing() {
-  if (GetEchoCancellationProperty())
-    return true;
-
-  for (size_t i = 0; i < arraysize(kDefaultAudioConstraints); ++i) {
-    // |kEchoCancellation| and |kGoogEchoCancellation| have been convered by
-    // GetEchoCancellationProperty().
-    if (kDefaultAudioConstraints[i].key != kEchoCancellation &&
-        kDefaultAudioConstraints[i].key != kGoogEchoCancellation &&
-        IsAudioProcessingConstraint(kDefaultAudioConstraints[i].key) &&
-        GetProperty(kDefaultAudioConstraints[i].key)) {
-      return true;
-    }
-  }
-
-  return false;
-}
-
 bool MediaAudioConstraints::GetProperty(const std::string& key) {
   // Return the value if the constraint is specified in |constraints|,
   // otherwise return the default value.