Wholesale conversion to #pragma once

Kudos to cgmb and https://github.com/cgmb/guardonce

Change-Id: Ifa8970734b8d43fd08c9260c645bdb0228633791
Reviewed-by: Tobias Hunger <tobias.hunger@theqtcompany.com>

src/libs/aggregation/examples/text/main.h

@@ -23,8 +23,7 @@
 **
 ****************************************************************************/
 
-#ifndef MAIN_H
-#define MAIN_H
+#pragma once
 
 #include "myinterfaces.h"
 #include "ui_main.h"
@@ -51,5 +50,3 @@ private:
 
     QList<IComboEntry *> m_entries;
 };
-
-#endif // MAIN_H

src/libs/aggregation/examples/text/myinterfaces.h

@@ -23,8 +23,7 @@
 **
 ****************************************************************************/
 
-#ifndef MYINTERFACES_H
-#define MYINTERFACES_H
+#pragma once
 
 #include <aggregate.h>
 
@@ -80,5 +79,3 @@ public:
 private:
     QString m_text;
 };
-
-#endif // MYINTERFACES_H