Removing a useless ctor in AudioNetworkAdaptorImpl.

webrtc/modules/audio_coding/audio_network_adaptor/audio_network_adaptor_impl.h

Index: webrtc/modules/audio_coding/audio_network_adaptor/audio_network_adaptor_impl.h
diff --git a/webrtc/modules/audio_coding/audio_network_adaptor/audio_network_adaptor_impl.h b/webrtc/modules/audio_coding/audio_network_adaptor/audio_network_adaptor_impl.h
index 289b6777e5313a33422ddb6b29c0d75c4af18b79..a97bbad21e42bd866129591cf708b609858d80d8 100644
--- a/webrtc/modules/audio_coding/audio_network_adaptor/audio_network_adaptor_impl.h
+++ b/webrtc/modules/audio_coding/audio_network_adaptor/audio_network_adaptor_impl.h
@@ -32,11 +32,6 @@ class AudioNetworkAdaptorImpl final : public AudioNetworkAdaptor {
 
   AudioNetworkAdaptorImpl(
       const Config& config,
-      std::unique_ptr<ControllerManager> controller_manager);
-
-  // Dependency injection for testing.
-  AudioNetworkAdaptorImpl(
-      const Config& config,
       std::unique_ptr<ControllerManager> controller_manager,
       std::unique_ptr<DebugDumpWriter> debug_dump_writer = nullptr);