Remove dead code

webrtc/modules/audio_coding/codecs/ilbc/audio_encoder_ilbc.h

Index: webrtc/modules/audio_coding/codecs/ilbc/audio_encoder_ilbc.h
diff --git a/webrtc/modules/audio_coding/codecs/ilbc/audio_encoder_ilbc.h b/webrtc/modules/audio_coding/codecs/ilbc/audio_encoder_ilbc.h
index c83be61fe9e8ab5df464273faae9cde9936ec74e..6a80a69d3223e488c858225bb4b721021e67021f 100644
--- a/webrtc/modules/audio_coding/codecs/ilbc/audio_encoder_ilbc.h
+++ b/webrtc/modules/audio_coding/codecs/ilbc/audio_encoder_ilbc.h
@@ -12,7 +12,6 @@
 #define WEBRTC_MODULES_AUDIO_CODING_CODECS_ILBC_AUDIO_ENCODER_ILBC_H_
 
 #include "webrtc/api/audio_codecs/audio_encoder.h"
-#include "webrtc/api/audio_codecs/audio_format.h"
 #include "webrtc/api/audio_codecs/ilbc/audio_encoder_ilbc_config.h"
 #include "webrtc/modules/audio_coding/codecs/ilbc/ilbc.h"
 #include "webrtc/rtc_base/constructormagic.h"
@@ -23,18 +22,10 @@ struct CodecInst;
 
 class AudioEncoderIlbcImpl final : public AudioEncoder {
  public:
-  static rtc::Optional<AudioEncoderIlbcConfig> SdpToConfig(
-      const SdpAudioFormat& format);
-
   AudioEncoderIlbcImpl(const AudioEncoderIlbcConfig& config, int payload_type);
   explicit AudioEncoderIlbcImpl(const CodecInst& codec_inst);
-  AudioEncoderIlbcImpl(int payload_type, const SdpAudioFormat& format);
   ~AudioEncoderIlbcImpl() override;
 
-  static constexpr const char* GetPayloadName() { return "ILBC"; }
-  static rtc::Optional<AudioCodecInfo> QueryAudioEncoder(
-      const SdpAudioFormat& format);
-
   int SampleRateHz() const override;
   size_t NumChannels() const override;
   size_t Num10MsFramesInNextPacket() const override;