Major updates to the echo removal functionality in AEC3

webrtc/modules/audio_processing/aec3/echo_remover_metrics.cc

Index: webrtc/modules/audio_processing/aec3/echo_remover_metrics.cc
diff --git a/webrtc/modules/audio_processing/aec3/echo_remover_metrics.cc b/webrtc/modules/audio_processing/aec3/echo_remover_metrics.cc
index 16a36f4fb9e8378c3762b6a365e2002b395cf64a..ed1195996fe59c49ce8f910702a0c3731b229c90 100644
--- a/webrtc/modules/audio_processing/aec3/echo_remover_metrics.cc
+++ b/webrtc/modules/audio_processing/aec3/echo_remover_metrics.cc
@@ -222,9 +222,6 @@ void EchoRemoverMetrics::Update(
             "WebRTC.Audio.EchoCanceller.UsableLinearEstimate",
             static_cast<int>(aec_state.UsableLinearEstimate() ? 1 : 0));
         RTC_HISTOGRAM_BOOLEAN(
-            "WebRTC.Audio.EchoCanceller.ModelBasedAecFeasible",
-            static_cast<int>(aec_state.ModelBasedAecFeasible() ? 1 : 0));
-        RTC_HISTOGRAM_BOOLEAN(
             "WebRTC.Audio.EchoCanceller.ActiveRender",
             static_cast<int>(
                 active_render_count_ > kMetricsCollectionBlocksBy2 ? 1 : 0));