diff --git a/api/audio_codecs/opus/BUILD.gn b/api/audio_codecs/opus/BUILD.gn
index 8c673116de..f96256e3c5 100644
--- a/api/audio_codecs/opus/BUILD.gn
+++ b/api/audio_codecs/opus/BUILD.gn
@@ -63,12 +63,10 @@ rtc_library("audio_decoder_opus") {
   ]
   deps = [
     "..:audio_codecs_api",
-    "../../../api:field_trials_view",
     "../../../modules/audio_coding:webrtc_opus",
     "../../../rtc_base:checks",
     "../../../rtc_base/system:rtc_export",
     "../../environment",
-    "../../transport:field_trial_based_config",
     "//third_party/abseil-cpp/absl/strings",
     "//third_party/abseil-cpp/absl/types:optional",
   ]
diff --git a/api/audio_codecs/opus/audio_decoder_opus.cc b/api/audio_codecs/opus/audio_decoder_opus.cc
index e1ba301cbd..c19cffce0b 100644
--- a/api/audio_codecs/opus/audio_decoder_opus.cc
+++ b/api/audio_codecs/opus/audio_decoder_opus.cc
@@ -21,8 +21,6 @@
 #include "api/audio_codecs/audio_codec_pair_id.h"
 #include "api/audio_codecs/audio_decoder.h"
 #include "api/audio_codecs/audio_format.h"
-#include "api/field_trials_view.h"
-#include "api/transport/field_trial_based_config.h"
 #include "modules/audio_coding/codecs/opus/audio_decoder_opus.h"
 #include "rtc_base/checks.h"
 
@@ -91,21 +89,4 @@ std::unique_ptr<AudioDecoder> AudioDecoderOpus::MakeAudioDecoder(
       env.field_trials(), config.num_channels, config.sample_rate_hz);
 }
 
-std::unique_ptr<AudioDecoder> AudioDecoderOpus::MakeAudioDecoder(
-    Config config,
-    absl::optional<AudioCodecPairId> /*codec_pair_id*/,
-    const FieldTrialsView* field_trials) {
-  if (!config.IsOk()) {
-    RTC_DCHECK_NOTREACHED();
-    return nullptr;
-  }
-  if (field_trials == nullptr) {
-    return std::make_unique<AudioDecoderOpusImpl>(
-        FieldTrialBasedConfig(), config.num_channels, config.sample_rate_hz);
-  } else {
-    return std::make_unique<AudioDecoderOpusImpl>(
-        *field_trials, config.num_channels, config.sample_rate_hz);
-  }
-}
-
 }  // namespace webrtc
diff --git a/api/audio_codecs/opus/audio_decoder_opus.h b/api/audio_codecs/opus/audio_decoder_opus.h
index 3ab430db3a..c2d5fdaad8 100644
--- a/api/audio_codecs/opus/audio_decoder_opus.h
+++ b/api/audio_codecs/opus/audio_decoder_opus.h
@@ -19,7 +19,6 @@
 #include "api/audio_codecs/audio_decoder.h"
 #include "api/audio_codecs/audio_format.h"
 #include "api/environment/environment.h"
-#include "api/field_trials_view.h"
 #include "rtc_base/system/rtc_export.h"
 
 namespace webrtc {
@@ -35,13 +34,6 @@ struct RTC_EXPORT AudioDecoderOpus {
   static absl::optional<Config> SdpToConfig(const SdpAudioFormat& audio_format);
   static void AppendSupportedDecoders(std::vector<AudioCodecSpec>* specs);
 
-  [[deprecated("bugs.webrtc.org/356878416")]]  //
-  static std::unique_ptr<AudioDecoder>
-  MakeAudioDecoder(
-      Config config,
-      absl::optional<AudioCodecPairId> codec_pair_id = absl::nullopt,
-      const FieldTrialsView* field_trials = nullptr);
-
   static std::unique_ptr<AudioDecoder> MakeAudioDecoder(const Environment& env,
                                                         Config config);
   static std::unique_ptr<AudioDecoder> MakeAudioDecoder(