Style: Replace header guards with #pragma once

core/io/translation_loader_po.h

@@ -28,8 +28,7 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
 /**************************************************************************/
 
-#ifndef TRANSLATION_LOADER_PO_H
-#define TRANSLATION_LOADER_PO_H
+#pragma once
 
 #include "core/io/file_access.h"
 #include "core/io/resource_loader.h"
@@ -49,5 +48,3 @@ public:
 
 	TranslationLoaderPO() {}
 };
-
-#endif // TRANSLATION_LOADER_PO_H