Revert of Add CreateWindowCapturer() and CreateScreenCapturer() in DesktopCapturer

webrtc/modules/desktop_capture/mock_desktop_capturer_callback.h

Index: webrtc/modules/desktop_capture/mock_desktop_capturer_callback.h
diff --git a/webrtc/modules/desktop_capture/mock_desktop_capturer_callback.h b/webrtc/modules/desktop_capture/mock_desktop_capturer_callback.h
deleted file mode 100644
index 3f67a9ef85d19138fa1ac827bdc14a4472825efc..0000000000000000000000000000000000000000
--- a/webrtc/modules/desktop_capture/mock_desktop_capturer_callback.h
+++ /dev/null
@@ -1,20 +0,0 @@
-/* Copyright (c) 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_MODULES_DESKTOP_CAPTURE_MOCK_DESKTOP_CAPTURER_CALLBACK_H_
-#define WEBRTC_MODULES_DESKTOP_CAPTURE_MOCK_DESKTOP_CAPTURER_CALLBACK_H_
-
-#include "webrtc/modules/desktop_capture/screen_capturer_mock_objects.h"
-
-namespace webrtc {
-// TODO(zijiehe): Remove MockScreenCapturerCallback.
-class MockDesktopCapturerCallback : public MockScreenCapturerCallback {};
-}  // namespace webrtc
-
-#endif  // WEBRTC_MODULES_DESKTOP_CAPTURE_MOCK_DESKTOP_CAPTURER_CALLBACK_H_