Remove old methods in AudioTransport, make it pass a gn build

webrtc/api/test/fakeaudiocapturemodule_unittest.cc

Index: webrtc/api/test/fakeaudiocapturemodule_unittest.cc
diff --git a/webrtc/api/test/fakeaudiocapturemodule_unittest.cc b/webrtc/api/test/fakeaudiocapturemodule_unittest.cc
index d0dcd85012b7dfb65f4bc996de7ccc9bd08fe52c..53fb5f2036e5a08981fd0ce417af592456d485be 100644
--- a/webrtc/api/test/fakeaudiocapturemodule_unittest.cc
+++ b/webrtc/api/test/fakeaudiocapturemodule_unittest.cc
@@ -62,6 +62,21 @@ class FakeAdmTest : public testing::Test,
     return 0;
   }
 
+  void PushCaptureData(int voe_channel,
+                       const void* audio_data,
+                       int bits_per_sample,
+                       int sample_rate,
+                       size_t number_of_channels,
+                       size_t number_of_frames) override {}
+
+  void PullRenderData(int bits_per_sample,
+                      int sample_rate,
+                      size_t number_of_channels,
+                      size_t number_of_frames,
+                      void* audio_data,
+                      int64_t* elapsed_time_ms,
+                      int64_t* ntp_time_ms) override {}
+
   // ADM is pulling data.
   int32_t NeedMorePlayData(const size_t nSamples,
                            const size_t nBytesPerSample,