removed temp code

deltachat-ios/Controller/QrPageController.swift

@@ -31,12 +31,6 @@ class QrPageController: UIPageViewController, ProgressAlertHandler {
     // MARK: - lifecycle
     override func viewDidLoad() {
         super.viewDidLoad()
-        
-        // temp fix - ToDo: check if this is needed for >iOS13 devices
-        if #available(iOS 13, *) {}
-        else {
-            self.view.backgroundColor = .white
-        }
         dataSource = self
         delegate = self
         navigationItem.titleView = qrSegmentControl