Revert of Added functionality for specifying the initial signal level to use for the gain estimation

webrtc/modules/audio_processing/level_controller/gain_selector.cc

Index: webrtc/modules/audio_processing/level_controller/gain_selector.cc
diff --git a/webrtc/modules/audio_processing/level_controller/gain_selector.cc b/webrtc/modules/audio_processing/level_controller/gain_selector.cc
index 80d9c0f1c56357ae29997905f14efe5a664be65e..2accd7180c4e9a6e2b942e47d56d69297aafa176 100644
--- a/webrtc/modules/audio_processing/level_controller/gain_selector.cc
+++ b/webrtc/modules/audio_processing/level_controller/gain_selector.cc
@@ -42,12 +42,10 @@
 float GainSelector::GetNewGain(float peak_level,
                                float noise_energy,
                                float saturating_gain,
-                               bool gain_jumpstart,
                                SignalClassifier::SignalType signal_type) {
   RTC_DCHECK_LT(0.f, peak_level);
 
-  if (signal_type == SignalClassifier::SignalType::kHighlyNonStationary ||
-      gain_jumpstart) {
+  if (signal_type == SignalClassifier::SignalType::kHighlyNonStationary) {
     highly_nonstationary_signal_hold_counter_ = 100;
   } else {
     highly_nonstationary_signal_hold_counter_ =