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>

tests/cppmodelmanager/testdata/include/header.h

@@ -1,4 +1 @@
-#ifndef HEADER_H
-#define HEADER_H
-
-#endif // HEADER_H
+#pragma once

tests/cppmodelmanager/testdata_guiproject1/mainwindow.h

@@ -1,7 +1,6 @@
 // Copyright license
 
-#ifndef MAINWINDOW_H
-#define MAINWINDOW_H
+#pragma once
 
 #include <QMainWindow>
 
@@ -20,5 +19,3 @@ public:
 private:
     Ui::MainWindow *ui;
 };
-
-#endif // MAINWINDOW_H

tests/cppmodelmanager/testdata_project1/foo.h

@@ -1,12 +1,9 @@
 // Copyright header
 
-#ifndef FOO_H
-#define FOO_H
+#pragma once
 
 class Foo
 {
 public:
     Foo();
 };
-
-#endif // FOO_H

tests/cppmodelmanager/testdata_project2/bar.h

@@ -1,12 +1,9 @@
 // Copyright header
 
-#ifndef BAR_H
-#define BAR_H
+#pragma once
 
 class Bar
 {
 public:
     Bar();
 };
-
-#endif // BAR_H