Remove duplicated headers after updating downstream code.

webrtc/modules/video_coding/main/interface/mock/mock_vcm_callbacks.h

Index: webrtc/modules/video_coding/main/interface/mock/mock_vcm_callbacks.h
diff --git a/webrtc/modules/video_coding/main/interface/mock/mock_vcm_callbacks.h b/webrtc/modules/video_coding/main/interface/mock/mock_vcm_callbacks.h
deleted file mode 100644
index 05a2939bd5946c5f05524c1ff9c22432dd32b016..0000000000000000000000000000000000000000
--- a/webrtc/modules/video_coding/main/interface/mock/mock_vcm_callbacks.h
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
- *  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.
- */
-
-#ifndef WEBRTC_MODULES_VIDEO_CODING_INCLUDE_MOCK_MOCK_VCM_CALLBACKS_H_
-#define WEBRTC_MODULES_VIDEO_CODING_INCLUDE_MOCK_MOCK_VCM_CALLBACKS_H_
-
-#pragma message("WARNING: video_coding/main/interface is DEPRECATED; use video_coding/include")
-
-#include "testing/gmock/include/gmock/gmock.h"
-#include "webrtc/modules/video_coding/include/video_coding_defines.h"
-#include "webrtc/typedefs.h"
-
-namespace webrtc {
-
-class MockVCMFrameTypeCallback : public VCMFrameTypeCallback {
- public:
-  MOCK_METHOD0(RequestKeyFrame, int32_t());
-  MOCK_METHOD1(SliceLossIndicationRequest,
-               int32_t(const uint64_t pictureId));
-};
-
-class MockPacketRequestCallback : public VCMPacketRequestCallback {
- public:
-  MOCK_METHOD2(ResendPackets, int32_t(const uint16_t* sequenceNumbers,
-                                      uint16_t length));
-};
-
-}  // namespace webrtc
-
-#endif  // WEBRTC_MODULES_VIDEO_CODING_INCLUDE_MOCK_MOCK_VCM_CALLBACKS_H_