drop updateViewIf()

it is useless, radio button groups have the signal actually needed

ui/src/main_window.cxx

@@ -21,9 +21,4 @@ void PROJECTNAME::updateView() {
 	m_ui->viewport->setView(args);
 }
 
-void PROJECTNAME::updateViewIf(bool update) {
-	if (update)
-		updateView();
-}
-
 #include "moc_main_window.cpp"

ui/src/main_window.hxx

@@ -16,7 +16,6 @@ public:
 
 public slots:
 	void updateView();
-	void updateViewIf(bool update); // for radio buttons
 
 private:
 	const std::unique_ptr<Ui::MainWindow> m_ui;