AntennaTracker: replace header guard with pragma once

AntennaTracker/Parameters.h

@@ -1,7 +1,5 @@
 // -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
-
-#ifndef PARAMETERS_H
-#define PARAMETERS_H
+#pragma once
 
 #include <AP_Common/AP_Common.h>
 
@@ -163,5 +161,3 @@ public:
 };
 
 extern const AP_Param::Info var_info[];
-
-#endif // PARAMETERS_H

AntennaTracker/config.h

@@ -1,5 +1,7 @@
 // -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
 //
+#pragma once
+
 #include "defines.h"
 
 #include "APM_Config.h" // <== THIS INCLUDE, DO NOT EDIT IT. EVER.

AntennaTracker/defines.h

@@ -1,7 +1,5 @@
 // -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
-
-#ifndef _DEFINES_H
-#define _DEFINES_H
+#pragma once
 
 // Command/Waypoint/Location Options Bitmask
 //--------------------
@@ -34,6 +32,3 @@ enum ServoType {
 #define MASK_LOG_RCOUT                  (1<<4)
 #define MASK_LOG_COMPASS                (1<<5)
 #define MASK_LOG_ANY                    0xFFFF
-
-#endif // _DEFINES_H
-