Removing a useless ctor in AudioNetworkAdaptorImpl.

webrtc/modules/audio_coding/audio_network_adaptor/audio_network_adaptor_impl.cc

Index: webrtc/modules/audio_coding/audio_network_adaptor/audio_network_adaptor_impl.cc
diff --git a/webrtc/modules/audio_coding/audio_network_adaptor/audio_network_adaptor_impl.cc b/webrtc/modules/audio_coding/audio_network_adaptor/audio_network_adaptor_impl.cc
index 3d8b2beb8d25217a1e86c2783616c58a4c565f70..5fa1bee8e9dfddb9565c4906c374e31d6e439ece 100644
--- a/webrtc/modules/audio_coding/audio_network_adaptor/audio_network_adaptor_impl.cc
+++ b/webrtc/modules/audio_coding/audio_network_adaptor/audio_network_adaptor_impl.cc
@@ -20,11 +20,6 @@ AudioNetworkAdaptorImpl::Config::~Config() = default;
 
 AudioNetworkAdaptorImpl::AudioNetworkAdaptorImpl(
     const Config& config,
-    std::unique_ptr<ControllerManager> controller_manager)
-    : AudioNetworkAdaptorImpl(config, std::move(controller_manager), nullptr) {}
-
-AudioNetworkAdaptorImpl::AudioNetworkAdaptorImpl(
-    const Config& config,
     std::unique_ptr<ControllerManager> controller_manager,
     std::unique_ptr<DebugDumpWriter> debug_dump_writer)
     : config_(config),