Remove interface directories kept to avoid breaking downstream.

webrtc/modules/rtp_rtcp/interface/rtp_cvo.h

Index: webrtc/modules/rtp_rtcp/interface/rtp_cvo.h
diff --git a/webrtc/modules/rtp_rtcp/interface/rtp_cvo.h b/webrtc/modules/rtp_rtcp/interface/rtp_cvo.h
deleted file mode 100644
index 6d942cbc92b10741a21671594871e508b86a72df..0000000000000000000000000000000000000000
--- a/webrtc/modules/rtp_rtcp/interface/rtp_cvo.h
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- *  Copyright (c) 2015 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_MODULES_RTP_RTCP_INCLUDE_RTP_CVO_H_
-#define WEBRTC_MODULES_RTP_RTCP_INCLUDE_RTP_CVO_H_
-
-#pragma message("WARNING: rtp_rtcp/interface is DEPRECATED; use include dir.")
-
-#include "webrtc/common_video/rotation.h"
-
-namespace webrtc {
-
-// Please refer to http://www.etsi.org/deliver/etsi_ts/126100_126199/126114/
-// 12.07.00_60/ts_126114v120700p.pdf Section 7.4.5. The rotation of a frame is
-// the clockwise angle the frames must be rotated in order to display the frames
-// correctly if the display is rotated in its natural orientation.
-inline uint8_t ConvertVideoRotationToCVOByte(VideoRotation rotation) {
-  switch (rotation) {
-    case kVideoRotation_0:
-      return 0;
-    case kVideoRotation_90:
-      return 1;
-    case kVideoRotation_180:
-      return 2;
-    case kVideoRotation_270:
-      return 3;
-  }
-  assert(false);
-  return 0;
-}
-
-inline VideoRotation ConvertCVOByteToVideoRotation(uint8_t rotation) {
-  switch (rotation) {
-    case 0:
-      return kVideoRotation_0;
-    case 1:
-      return kVideoRotation_90;
-    case 2:
-      return kVideoRotation_180;
-      break;
-    case 3:
-      return kVideoRotation_270;
-    default:
-      assert(false);
-      return kVideoRotation_0;
-  }
-}
-
-}  // namespace webrtc
-#endif  // WEBRTC_MODULES_RTP_RTCP_INCLUDE_RTP_CVO_H_