Remove dead code

webrtc/modules/audio_coding/codecs/g722/audio_encoder_g722.h

Index: webrtc/modules/audio_coding/codecs/g722/audio_encoder_g722.h
diff --git a/webrtc/modules/audio_coding/codecs/g722/audio_encoder_g722.h b/webrtc/modules/audio_coding/codecs/g722/audio_encoder_g722.h
index 00d1c0f3e6d60206c8c9a991f1319c3f12223dcf..b4d9ef01e42b2e783b57d6d522d829bb6ea53bfa 100644
--- a/webrtc/modules/audio_coding/codecs/g722/audio_encoder_g722.h
+++ b/webrtc/modules/audio_coding/codecs/g722/audio_encoder_g722.h
@@ -14,7 +14,6 @@
 #include <memory>
 
 #include "webrtc/api/audio_codecs/audio_encoder.h"
-#include "webrtc/api/audio_codecs/audio_format.h"
 #include "webrtc/api/audio_codecs/g722/audio_encoder_g722_config.h"
 #include "webrtc/modules/audio_coding/codecs/g722/g722_interface.h"
 #include "webrtc/rtc_base/buffer.h"
@@ -26,18 +25,10 @@ struct CodecInst;
 
 class AudioEncoderG722Impl final : public AudioEncoder {
  public:
-  static rtc::Optional<AudioEncoderG722Config> SdpToConfig(
-      const SdpAudioFormat& format);
-
   AudioEncoderG722Impl(const AudioEncoderG722Config& config, int payload_type);
   explicit AudioEncoderG722Impl(const CodecInst& codec_inst);
-  AudioEncoderG722Impl(int payload_type, const SdpAudioFormat& format);
   ~AudioEncoderG722Impl() override;
 
-  static constexpr const char* GetPayloadName() { return "G722"; }
-  static rtc::Optional<AudioCodecInfo> QueryAudioEncoder(
-      const SdpAudioFormat& format);
-
   int SampleRateHz() const override;
   size_t NumChannels() const override;
   int RtpTimestampRateHz() const override;