fix: ios build error

Signed-off-by: OctagonalStar <76486554+OctagonalStar@users.noreply.github.com>

Author: OctagonalStar

ios/Runner/AppDelegate.swift

@@ -7,9 +7,6 @@ import UIKit
     _ application: UIApplication,
     didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
   ) -> Bool {
-    if #available(iOS 10.0, *) {
-      UNUserNotificationCenter.current().delegate = self as? UNUserNotificationCenterDelegate
-    }
     GeneratedPluginRegistrant.register(with: self)
     return super.application(application, didFinishLaunchingWithOptions: launchOptions)
   }