Revert of Adding backward compatibility header

webrtc/sdk/objc/Framework/Classes/corevideo_frame_buffer.h

Index: webrtc/sdk/objc/Framework/Classes/corevideo_frame_buffer.h
diff --git a/webrtc/sdk/objc/Framework/Classes/corevideo_frame_buffer.h b/webrtc/sdk/objc/Framework/Classes/corevideo_frame_buffer.h
deleted file mode 100644
index bef9372cef79d65b62314d7d9f593ad2db79ed3a..0000000000000000000000000000000000000000
--- a/webrtc/sdk/objc/Framework/Classes/corevideo_frame_buffer.h
+++ /dev/null
@@ -1,19 +0,0 @@
-/*
- *  Copyright 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.
- */
-
-#ifndef WEBRTC_SDK_OBJC_FRAMEWORK_CLASSES_COREVIDEO_FRAME_BUFFER_H_
-#define WEBRTC_SDK_OBJC_FRAMEWORK_CLASSES_COREVIDEO_FRAME_BUFFER_H_
-
-// This is a backward compatibility header. It will be removed as soon as
-// dowstream projects will be updated.
-
-#include "webrtc/sdk/objc/Framework/Classes/Video/corevideo_frame_buffer.h"
-
-#endif  // WEBRTC_SDK_OBJC_FRAMEWORK_CLASSES_COREVIDEO_FRAME_BUFFER_H_