Revert of Introduced new scheme for controlling the functionality inside the audio processing module

webrtc/modules/audio_processing/test/audio_processing_simulator.cc

Index: webrtc/modules/audio_processing/test/audio_processing_simulator.cc
diff --git a/webrtc/modules/audio_processing/test/audio_processing_simulator.cc b/webrtc/modules/audio_processing/test/audio_processing_simulator.cc
index 778b347091d82a9270a2904e8c4d329061df60c2..a34c3ca78ee2922722031c98df0a76e02d7e3269 100644
--- a/webrtc/modules/audio_processing/test/audio_processing_simulator.cc
+++ b/webrtc/modules/audio_processing/test/audio_processing_simulator.cc
@@ -218,7 +218,6 @@
 
 void AudioProcessingSimulator::CreateAudioProcessor() {
   Config config;
-  AudioProcessing::Config apm_config;
   if (settings_.use_bf && *settings_.use_bf) {
     config.Set<Beamforming>(new Beamforming(
         true, ParseArrayGeometry(*settings_.microphone_positions),
@@ -235,7 +234,7 @@
     config.Set<EchoCanceller3>(new EchoCanceller3(*settings_.use_aec3));
   }
   if (settings_.use_lc) {
-    apm_config.level_controller.enabled = *settings_.use_lc;
+    config.Set<LevelControl>(new LevelControl(true));
   }
   if (settings_.use_refined_adaptive_filter) {
     config.Set<RefinedAdaptiveFilter>(
@@ -247,9 +246,6 @@
                                               *settings_.use_delay_agnostic));
 
   ap_.reset(AudioProcessing::Create(config));
-  RTC_CHECK(ap_);
-
-  ap_->ApplyConfig(apm_config);
 
   if (settings_.use_aec) {
     RTC_CHECK_EQ(AudioProcessing::kNoError,