Revert of WebRtcVoiceEngine: Use AudioDecoderFactory to generate recv codecs.

webrtc/modules/audio_coding/codecs/builtin_audio_decoder_factory.cc

Index: webrtc/modules/audio_coding/codecs/builtin_audio_decoder_factory.cc
diff --git a/webrtc/modules/audio_coding/codecs/builtin_audio_decoder_factory.cc b/webrtc/modules/audio_coding/codecs/builtin_audio_decoder_factory.cc
index a7f740489210686894105159cb103d1c25b9c5bb..48b2f5d437312de30531837bda4c34fb9ca04732 100644
--- a/webrtc/modules/audio_coding/codecs/builtin_audio_decoder_factory.cc
+++ b/webrtc/modules/audio_coding/codecs/builtin_audio_decoder_factory.cc
@@ -130,31 +130,7 @@
 class BuiltinAudioDecoderFactory : public AudioDecoderFactory {
  public:
   std::vector<SdpAudioFormat> GetSupportedFormats() override {
-    static std::vector<SdpAudioFormat> formats = {
-#ifdef WEBRTC_CODEC_OPUS
-      { "opus", 48000, 2, {
-          {"minptime", "10" },
-          {"useinbandfec", "1" }
-        }
-      },
-#endif
-#if (defined(WEBRTC_CODEC_ISAC) || defined(WEBRTC_CODEC_ISACFX))
-      { "isac", 16000, 1 },
-#endif
-#if (defined(WEBRTC_CODEC_ISAC))
-      { "isac", 32000, 1 },
-#endif
-#ifdef WEBRTC_CODEC_G722
-      { "G722", 8000,  1 },
-#endif
-#ifdef WEBRTC_CODEC_ILBC
-      { "iLBC", 8000,  1 },
-#endif
-      { "PCMU", 8000,  1 },
-      { "PCMA", 8000,  1 }
-    };
-
-    return formats;
+    FATAL() << "Not implemented yet!";
   }
 
   std::unique_ptr<AudioDecoder> MakeAudioDecoder(