QR code: QR code scanning is not available in the simulator

Signed-off-by: Roopesh Chander <roop@roopc.net>

WireGuard/WireGuard/UI/iOS/TunnelsListTableViewController.swift

@@ -113,11 +113,17 @@ class TunnelsListTableViewController: UITableViewController {
     }
 
     func presentViewControllerForScanningQRCode() {
+        #if targetEnvironment(simulator)
+        print("Scanning QR code is unavailable in the simulator")
+        #else
+
         let scanQRCodeVC = QRScanViewController()
         scanQRCodeVC.delegate = self
         let scanQRCodeNC = UINavigationController(rootViewController: scanQRCodeVC)
         scanQRCodeNC.modalPresentationStyle = .fullScreen
         self.present(scanQRCodeNC, animated: true)
+
+        #endif
     }
 
     func showErrorAlert(title: String, message: String) {