Delete unused file mediacommon.h.

webrtc/media/base/mediacommon.h

-/*
- *  Copyright (c) 2004 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_MEDIA_BASE_MEDIACOMMON_H_
-#define WEBRTC_MEDIA_BASE_MEDIACOMMON_H_
-
-#include "webrtc/base/stringencode.h"
-
-namespace cricket {
-
-enum MediaCapabilities {
-  AUDIO_RECV = 1 << 0,
-  AUDIO_SEND = 1 << 1,
-  VIDEO_RECV = 1 << 2,
-  VIDEO_SEND = 1 << 3,
-};
-
-}  // namespace cricket
-
-#endif  // WEBRTC_MEDIA_BASE_MEDIACOMMON_H_