diff --git a/api/audio/echo_canceller3_config.cc b/api/audio/echo_canceller3_config.cc
index a560c9eb20..617f5aeca0 100644
--- a/api/audio/echo_canceller3_config.cc
+++ b/api/audio/echo_canceller3_config.cc
@@ -171,10 +171,6 @@ bool EchoCanceller3Config::Validate(EchoCanceller3Config* config) {
   res = res & Limit(&c->echo_model.noise_gate_slope, 0, 1000000.f);
   res = res & Limit(&c->echo_model.render_pre_window_size, 0, 100);
   res = res & Limit(&c->echo_model.render_post_window_size, 0, 100);
-  res = res & Limit(&c->echo_model.render_pre_window_size_init, 0, 100);
-  res = res & Limit(&c->echo_model.render_post_window_size_init, 0, 100);
-  res = res & Limit(&c->echo_model.nonlinear_hold, 0, 100);
-  res = res & Limit(&c->echo_model.nonlinear_release, 0, 1.f);
 
   res = res & Limit(&c->suppressor.nearend_average_blocks, 1, 5000);
 
diff --git a/api/audio/echo_canceller3_config.h b/api/audio/echo_canceller3_config.h
index 7dcc7dd9c2..e304f15ec5 100644
--- a/api/audio/echo_canceller3_config.h
+++ b/api/audio/echo_canceller3_config.h
@@ -125,10 +125,6 @@ struct RTC_EXPORT EchoCanceller3Config {
     float noise_gate_slope = 0.3f;
     size_t render_pre_window_size = 1;
     size_t render_post_window_size = 1;
-    size_t render_pre_window_size_init = 10;
-    size_t render_post_window_size_init = 10;
-    float nonlinear_hold = 1;
-    float nonlinear_release = 0.001f;
   } echo_model;
 
   struct Suppressor {
diff --git a/api/audio/echo_canceller3_config_json.cc b/api/audio/echo_canceller3_config_json.cc
index 4c8c8ab6f4..07c4e52447 100644
--- a/api/audio/echo_canceller3_config_json.cc
+++ b/api/audio/echo_canceller3_config_json.cc
@@ -250,12 +250,6 @@ void Aec3ConfigFromJsonString(absl::string_view json_string,
               &cfg.echo_model.render_pre_window_size);
     ReadParam(section, "render_post_window_size",
               &cfg.echo_model.render_post_window_size);
-    ReadParam(section, "render_pre_window_size_init",
-              &cfg.echo_model.render_pre_window_size_init);
-    ReadParam(section, "render_post_window_size_init",
-              &cfg.echo_model.render_post_window_size_init);
-    ReadParam(section, "nonlinear_hold", &cfg.echo_model.nonlinear_hold);
-    ReadParam(section, "nonlinear_release", &cfg.echo_model.nonlinear_release);
   }
 
   Json::Value subsection;
@@ -463,13 +457,7 @@ std::string Aec3ConfigToJsonString(const EchoCanceller3Config& config) {
   ost << "\"render_pre_window_size\": "
       << config.echo_model.render_pre_window_size << ",";
   ost << "\"render_post_window_size\": "
-      << config.echo_model.render_post_window_size << ",";
-  ost << "\"render_pre_window_size_init\": "
-      << config.echo_model.render_pre_window_size_init << ",";
-  ost << "\"render_post_window_size_init\": "
-      << config.echo_model.render_post_window_size_init << ",";
-  ost << "\"nonlinear_hold\": " << config.echo_model.nonlinear_hold << ",";
-  ost << "\"nonlinear_release\": " << config.echo_model.nonlinear_release;
+      << config.echo_model.render_post_window_size;
   ost << "},";
 
   ost << "\"suppressor\": {";