Use #pragma once instead of include guards

src/gui/rss/rsswidget.h

@@ -28,8 +28,7 @@
  * exception statement from your version.
  */
 
-#ifndef RSSWIDGET_H
-#define RSSWIDGET_H
+#pragma once
 
 #include <QWidget>
 
@@ -86,5 +85,3 @@ private:
     ArticleListWidget *m_articleListWidget;
     FeedListWidget *m_feedListWidget;
 };
-
-#endif // RSSWIDGET_H