Remove unused file

test/mock/mock_IGameEventCallback.h

@@ -1,23 +0,0 @@
-/*
- * mock_IGameEventCallback.h, part of VCMI engine
- *
- * Authors: listed in file AUTHORS in main folder
- *
- * License: GNU General Public License v2.0 or later
- * Full text of license available in license.txt file, in main folder
- *
- */
-
-#pragma once
-
-#include "../../lib/IGameCallback.h"
-
-class IGameEventCallbackMock : public IGameEventCallback
-{
-public:
-
-};
-
-
-
-