Remove 3 defines in voice_engine_configurations.h

webrtc/voice_engine_configurations.h

 /*
  *  Copyright (c) 2012 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.
  */
 
 #ifndef WEBRTC_VOICE_ENGINE_CONFIGURATIONS_H_
 #define WEBRTC_VOICE_ENGINE_CONFIGURATIONS_H_
 
 #include "webrtc/typedefs.h"
 
 // ============================================================================
 //                                 VoiceEngine
 // ============================================================================
 
 // ----------------------------------------------------------------------------
 //  Settings for VoiceEngine
 // ----------------------------------------------------------------------------
 
-#define WEBRTC_VOICE_ENGINE_AGC                 // Near-end AGC
-#define WEBRTC_VOICE_ENGINE_ECHO                // Near-end AEC
-#define WEBRTC_VOICE_ENGINE_NR                  // Near-end NS
-
 #if !defined(WEBRTC_ANDROID) && !defined(WEBRTC_IOS)
 #define WEBRTC_VOICE_ENGINE_TYPING_DETECTION    // Typing detection
 #endif
 
 // ----------------------------------------------------------------------------
 //  VoiceEngine sub-APIs
 // ----------------------------------------------------------------------------
 
 #define WEBRTC_VOICE_ENGINE_AUDIO_PROCESSING_API
 #define WEBRTC_VOICE_ENGINE_CODEC_API
 #define WEBRTC_VOICE_ENGINE_EXTERNAL_MEDIA_API
 #define WEBRTC_VOICE_ENGINE_FILE_API
 #define WEBRTC_VOICE_ENGINE_HARDWARE_API
 #define WEBRTC_VOICE_ENGINE_NETEQ_STATS_API
 #define WEBRTC_VOICE_ENGINE_RTP_RTCP_API
 #define WEBRTC_VOICE_ENGINE_VIDEO_SYNC_API
 #define WEBRTC_VOICE_ENGINE_VOLUME_CONTROL_API
 
 #endif  // WEBRTC_VOICE_ENGINE_CONFIGURATIONS_H_