Delete remnants of RTX support in voice_engine.

webrtc/voice_engine/voice_engine_defines.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 16 matching lines @@
 enum { kMaxVolumeLevel = 255 };
 // Min scale factor for per-channel volume scaling
 const float kMinOutputVolumeScaling = 0.0f;
 // Max scale factor for per-channel volume scaling
 const float kMaxOutputVolumeScaling = 10.0f;
 // Min scale factor for output volume panning
 const float kMinOutputVolumePanning = 0.0f;
 // Max scale factor for output volume panning
 const float kMaxOutputVolumePanning = 1.0f;
 
-enum { kVoiceEngineMaxIpPacketSizeBytes = 1500 };  // assumes Ethernet
-
 // Audio processing
 const NoiseSuppression::Level kDefaultNsMode = NoiseSuppression::kModerate;
 const GainControl::Mode kDefaultAgcMode =
 #if defined(WEBRTC_ANDROID) || defined(WEBRTC_IOS)
     GainControl::kAdaptiveDigital;
 #else
     GainControl::kAdaptiveAnalog;
 #endif
 const bool kDefaultAgcState =
 #if defined(WEBRTC_ANDROID) || defined(WEBRTC_IOS)
@@ skipping 44 matching lines @@
 }  // namespace webrtc
 
 #if defined(_WIN32)
 #define WEBRTC_VOICE_ENGINE_DEFAULT_DEVICE \
   AudioDeviceModule::kDefaultCommunicationDevice
 #else
 #define WEBRTC_VOICE_ENGINE_DEFAULT_DEVICE 0
 #endif  // #if (defined(_WIN32)
 
 #endif  // WEBRTC_VOICE_ENGINE_VOICE_ENGINE_DEFINES_H