Unnecessary use of a pointer for MainWindow.

src/main.cpp

@@ -83,8 +83,8 @@ int Q_DECL_IMPORT main(int argc, char* argv[])
     if (!loadBackend())
         return 0;
 
-    MainWindow* mainWindow = new MainWindow();
-    mainWindow->show();
+    MainWindow mainWindow;
+    mainWindow.show();
 
     return app.exec();
 }