Remove unused NonlinearBeamformer interface

webrtc/modules/audio_processing/beamformer/mock_nonlinear_beamformer.h

Index: webrtc/modules/audio_processing/beamformer/mock_nonlinear_beamformer.h
diff --git a/webrtc/modules/audio_processing/beamformer/mock_nonlinear_beamformer.h b/webrtc/modules/audio_processing/beamformer/mock_nonlinear_beamformer.h
index 11201f507f2fc9fa5a5b84e6c6abacbf5d690c33..3bb14859424bb2ae4bb866e3c53aaf230b196059 100644
--- a/webrtc/modules/audio_processing/beamformer/mock_nonlinear_beamformer.h
+++ b/webrtc/modules/audio_processing/beamformer/mock_nonlinear_beamformer.h
@@ -28,9 +28,6 @@ class MockNonlinearBeamformer : public NonlinearBeamformer {
       : NonlinearBeamformer(array_geometry, 1u) {}
 
   MOCK_METHOD2(Initialize, void(int chunk_size_ms, int sample_rate_hz));
-  // TODO(aluebs): Remove once the dependencies have moved to new API.
-  MOCK_METHOD2(ProcessChunk, void(const ChannelBuffer<float>& data,
-                                  ChannelBuffer<float>* output));
   MOCK_METHOD1(AnalyzeChunk, void(const ChannelBuffer<float>& data));
   MOCK_METHOD1(PostFilter, void(ChannelBuffer<float>* data));
   MOCK_METHOD1(IsInBeam, bool(const SphericalPointf& spherical_point));