Removing AudioCoding class, a.k.a the new ACM API

webrtc/modules/audio_coding/main/acm2/audio_coding_module.cc

Index: webrtc/modules/audio_coding/main/acm2/audio_coding_module.cc
diff --git a/webrtc/modules/audio_coding/main/acm2/audio_coding_module.cc b/webrtc/modules/audio_coding/main/acm2/audio_coding_module.cc
index f502eb3f8c08fe1b95251edcb02614caac5a2296..8a0980e6190f3d6526a594a83c6d465937ee14a3 100644
--- a/webrtc/modules/audio_coding/main/acm2/audio_coding_module.cc
+++ b/webrtc/modules/audio_coding/main/acm2/audio_coding_module.cc
@@ -100,18 +100,4 @@ bool AudioCodingModule::IsCodecValid(const CodecInst& codec) {
   }
 }
 
-AudioCoding::Config::Config()
-    : neteq_config(),
-      clock(Clock::GetRealTimeClock()),
-      transport(nullptr),
-      vad_callback(nullptr),
-      initial_playout_delay_ms(0),
-      playout_channels(1),
-      playout_frequency_hz(32000) {
-}
-
-AudioCoding* AudioCoding::Create(const Config& config) {
-  return new AudioCodingImpl(config);
-}
-
 }  // namespace webrtc