Delete I420 encoder and decoder.

webrtc/modules/video_coding/test/test_util.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 56 matching lines @@
   int height_;
   int count_;
 
   RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(FileOutputFrameReceiver);
 };
 
 class CmdArgs {
  public:
   CmdArgs();
 
-  std::string codecName;
-  webrtc::VideoCodecType codecType;
-  int width;
-  int height;
-  int rtt;
   std::string inputFile;
   std::string outputFile;
 };
 
 #endif  // WEBRTC_MODULES_VIDEO_CODING_TEST_TEST_UTIL_H_