revert unnecessary change

deltachat-ios/AppDelegate.swift

@@ -42,7 +42,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterD
         return []
     }
 
-    func application(_: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey: Any] = [:]) -> Bool {
+    func application(_: UIApplication, open url: URL, options _: [UIApplication.OpenURLOptionsKey: Any] = [:]) -> Bool {
         // gets here when app returns from oAuth2-Setup process - the url contains the provided token
         if let params = url.queryParameters, let token = params["code"] {
             NotificationCenter.default.post(name: NSNotification.Name("oauthLoginApproved"), object: nil, userInfo: ["token": token])