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

webrtc/modules/audio_processing/level_controller/level_controller_unittest.cc

 /*
  *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 50 matching lines @@
   // memory, testing only the last frame implicitly also tests the preceeding
   // frames.
   const float kVectorElementErrorBound = 1.0f / 32768.0f;
   EXPECT_TRUE(test::VerifyDeinterleavedArray(
       capture_config.num_frames(), capture_config.num_channels(),
       output_reference, capture_output, kVectorElementErrorBound));
 }
 
 }  // namespace
 
-TEST(LevelControlConfigTest, ToStringEnabled) {
-  AudioProcessing::Config config;
-  config.level_controller.enabled = true;
-  EXPECT_EQ("{enabled: true}",
-            LevelController::ToString(config.level_controller));
-}
-
-TEST(LevelControlConfigTest, ToStringNotEnabled) {
-  AudioProcessing::Config config;
-  config.level_controller.enabled = false;
-  EXPECT_EQ("{enabled: false}",
-            LevelController::ToString(config.level_controller));
-}
-
-TEST(LevelControlConfigTest, DefaultValue) {
-  AudioProcessing::Config config;
-  EXPECT_FALSE(config.level_controller.enabled);
-}
-
 TEST(LevelControlBitExactnessTest, DISABLED_Mono8kHz) {
   const float kOutputReference[] = {-0.013939f, -0.012154f, -0.009054f};
   RunBitexactnessTest(AudioProcessing::kSampleRate8kHz, 1,
                       kOutputReference);
 }
 
 TEST(LevelControlBitExactnessTest, DISABLED_Mono16kHz) {
   const float kOutputReference[] = {-0.013706f, -0.013215f, -0.013018f};
   RunBitexactnessTest(AudioProcessing::kSampleRate16kHz, 1,
                       kOutputReference);
@@ skipping 42 matching lines @@
 TEST(LevelControlBitExactnessTest, DISABLED_Stereo48kHz) {
   const float kOutputReference[] = {-0.010643f, -0.006334f, -0.011377f,
                                     -0.049088f, -0.023600f, -0.050465f};
   RunBitexactnessTest(AudioProcessing::kSampleRate48kHz, 2,
                       kOutputReference);
 }
 
 
 
 }  // namespace webrtc