Remove the preprocessor symbol WEBRTC_CODEC_AVT (it was always defined)

webrtc/modules/audio_coding/main/acm2/acm_codec_database.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.
  */
 
@@ skipping 53 matching lines @@
 #ifdef WEBRTC_CODEC_OPUS
     // Mono and stereo
     , kOpus
 #endif
     , kCNNB
     , kCNWB
     , kCNSWB
 #ifdef ENABLE_48000_HZ
     , kCNFB
 #endif
-#ifdef WEBRTC_CODEC_AVT
     , kAVT
-#endif
 #ifdef WEBRTC_CODEC_RED
     , kRED
 #endif
     , kNumCodecs
   };
 
   // Set unsupported codecs to -1
 #ifndef WEBRTC_CODEC_ISAC
   enum {kISACSWB = -1};
   enum {kISACFB = -1};
 # ifndef WEBRTC_CODEC_ISACFX
   enum {kISAC = -1};
 # endif
 #endif
   // 48 kHz not supported, always set to -1.
   enum {kPCM16Bswb48kHz = -1};
 #ifndef WEBRTC_CODEC_ILBC
   enum {kILBC = -1};
 #endif
 #ifndef WEBRTC_CODEC_G722
   // Mono
   enum {kG722 = -1};
   // Stereo
   enum {kG722_2ch = -1};
 #endif
 #ifndef WEBRTC_CODEC_OPUS
   // Mono and stereo
   enum {kOpus = -1};
 #endif
-#ifndef WEBRTC_CODEC_AVT
-  enum {kAVT = -1};
-#endif
 #ifndef WEBRTC_CODEC_RED
   enum {kRED = -1};
 #endif
 #ifndef ENABLE_48000_HZ
   enum { kCNFB = -1 };
 #endif
 
   // kMaxNumCodecs - Maximum number of codecs that can be activated in one
   //                 build.
   // kMaxNumPacketSize - Maximum number of allowed packet sizes for one codec.
@@ skipping 110 matching lines @@
   static const CodecInst database_[kMaxNumCodecs];
   static const CodecSettings codec_settings_[kMaxNumCodecs];
   static const NetEqDecoder neteq_decoders_[kMaxNumCodecs];
 };
 
 }  // namespace acm2
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_CODING_MAIN_ACM2_ACM_CODEC_DATABASE_H_