diff --git a/modules/audio_processing/audio_processing_impl.cc b/modules/audio_processing/audio_processing_impl.cc
index f9a6460d04..501f65933d 100644
--- a/modules/audio_processing/audio_processing_impl.cc
+++ b/modules/audio_processing/audio_processing_impl.cc
@@ -1574,14 +1574,6 @@ void AudioProcessingImpl::DetachAecDump() {
   }
 }
 
-void AudioProcessingImpl::MutateConfig(
-    rtc::FunctionView<void(AudioProcessing::Config*)> mutator) {
-  MutexLock lock_render(&mutex_render_);
-  MutexLock lock_capture(&mutex_capture_);
-  mutator(&config_);
-  ApplyConfig(config_);
-}
-
 AudioProcessing::Config AudioProcessingImpl::GetConfig() const {
   MutexLock lock_render(&mutex_render_);
   MutexLock lock_capture(&mutex_capture_);
diff --git a/modules/audio_processing/audio_processing_impl.h b/modules/audio_processing/audio_processing_impl.h
index d0eec0eec3..3dc13bd96d 100644
--- a/modules/audio_processing/audio_processing_impl.h
+++ b/modules/audio_processing/audio_processing_impl.h
@@ -133,8 +133,6 @@ class AudioProcessingImpl : public AudioProcessing {
     return stats_reporter_.GetStatistics();
   }
 
-  // TODO(peah): Remove MutateConfig once the new API allows that.
-  void MutateConfig(rtc::FunctionView<void(AudioProcessing::Config*)> mutator);
   AudioProcessing::Config GetConfig() const override;
 
  protected: