Removed more dead files

src/AirspaceManagement/AirspaceAuthorization.h

-/****************************************************************************
- *
- *   (c) 2009-2016 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
- *
- * QGroundControl is licensed according to the terms in the file
- * COPYING.md in the root of the source code directory.
- *
- ****************************************************************************/
-
-#pragma once
-
-#include <QObject>
-
-//-----------------------------------------------------------------------------
-/**
- * Contains the status of the Airspace authorization
- */
-class AirspaceAuthorization : public QObject {
-    Q_OBJECT
-public:
-    enum PermitStatus {
-        PermitUnknown = 0,
-        PermitPending,
-        PermitAccepted,
-        PermitRejected,
-    };
-    Q_ENUM(PermitStatus)
-};

src/comm/CallConv.h

-#pragma once
-
-#ifdef Q_OS_WIN
-#define CALLTYPEXBEE __stdcall
-#else // Q_OS_WIN
-#define CALLTYPEXBEE
-
-