Remove flag PaceAtLossBaseBweWhenLoss as it is not used.

Change-Id: Ie08745e302c1fe582d4ed3b86e96d7a95d021d78
Bug: None
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/283361
Reviewed-by: Per Kjellander <perkj@webrtc.org>
Commit-Queue: Diep Bui <diepbp@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38632}
diff --git a/modules/congestion_controller/goog_cc/goog_cc_network_control.cc b/modules/congestion_controller/goog_cc/goog_cc_network_control.cc
index 842bb58..033094f 100644
--- a/modules/congestion_controller/goog_cc/goog_cc_network_control.cc
+++ b/modules/congestion_controller/goog_cc/goog_cc_network_control.cc
@@ -85,8 +85,6 @@
       pace_at_max_of_bwe_and_lower_link_capacity_(
           IsEnabled(key_value_config_,
                     "WebRTC-Bwe-PaceAtMaxOfBweAndLowerLinkCapacity")),
-      pace_at_loss_based_bwe_when_loss_(
-          IsEnabled(key_value_config_, "WebRTC-Bwe-PaceAtLossBaseBweWhenLoss")),
       probe_controller_(
           new ProbeController(key_value_config_, config.event_log)),
       congestion_window_pushback_controller_(
@@ -688,10 +686,7 @@
   // Pacing rate is based on target rate before congestion window pushback,
   // because we don't want to build queues in the pacer when pushback occurs.
   DataRate pacing_rate = DataRate::Zero();
-  if ((pace_at_max_of_bwe_and_lower_link_capacity_ ||
-       (pace_at_loss_based_bwe_when_loss_ &&
-        last_loss_based_target_rate_ >= delay_based_bwe_->last_estimate())) &&
-      estimate_) {
+  if (pace_at_max_of_bwe_and_lower_link_capacity_ && estimate_) {
     pacing_rate =
         std::max({min_total_allocated_bitrate_, estimate_->link_capacity_lower,
                   last_loss_based_target_rate_}) *
diff --git a/modules/congestion_controller/goog_cc/goog_cc_network_control.h b/modules/congestion_controller/goog_cc/goog_cc_network_control.h
index 1b9f962..32526f8 100644
--- a/modules/congestion_controller/goog_cc/goog_cc_network_control.h
+++ b/modules/congestion_controller/goog_cc/goog_cc_network_control.h
@@ -95,7 +95,6 @@
   const RateControlSettings rate_control_settings_;
   const bool loss_based_stable_rate_;
   const bool pace_at_max_of_bwe_and_lower_link_capacity_;
-  const bool pace_at_loss_based_bwe_when_loss_;
 
   const std::unique_ptr<ProbeController> probe_controller_;
   const std::unique_ptr<CongestionWindowPushbackController>