Delete header file mock_vcm_callbacks.h

Move definitions of mock classes to the only user, the unit tests for
the deprecated class vcm::VideoReceiver.

Bug: webrtc:7408
Change-Id: I05e38ed8ebbe615bb2db0b631ec914773fb0a520
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/168182
Reviewed-by: Philip Eliasson <philipel@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30451}

modules/video_coding/include/mock/mock_vcm_callbacks.h

@@ -1,39 +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 MODULES_VIDEO_CODING_INCLUDE_MOCK_MOCK_VCM_CALLBACKS_H_
-#define MODULES_VIDEO_CODING_INCLUDE_MOCK_MOCK_VCM_CALLBACKS_H_
-
-#include "modules/video_coding/include/video_coding_defines.h"
-#include "test/gmock.h"
-
-namespace webrtc {
-
-class MockPacketRequestCallback : public VCMPacketRequestCallback {
- public:
-  MOCK_METHOD2(ResendPackets,
-               int32_t(const uint16_t* sequenceNumbers, uint16_t length));
-};
-
-class MockVCMReceiveCallback : public VCMReceiveCallback {
- public:
-  MockVCMReceiveCallback() {}
-  virtual ~MockVCMReceiveCallback() {}
-
-  MOCK_METHOD4(
-      FrameToRender,
-      int32_t(VideoFrame&, absl::optional<uint8_t>, int32_t, VideoContentType));
-  MOCK_METHOD1(OnIncomingPayloadType, void(int));
-  MOCK_METHOD1(OnDecoderImplementationName, void(const char*));
-};
-
-}  // namespace webrtc
-
-#endif  // MODULES_VIDEO_CODING_INCLUDE_MOCK_MOCK_VCM_CALLBACKS_H_