remove subfolder flutter_hbb

ios/Runner/AppDelegate.swift

@@ -0,0 +1,21 @@
+import UIKit
+import Flutter
+
+@UIApplicationMain
+@objc class AppDelegate: FlutterAppDelegate {
+  override func application(
+    _ application: UIApplication,
+    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
+  ) -> Bool {
+    GeneratedPluginRegistrant.register(with: self)
+    dummyMethodToEnforceBundling();
+    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
+  }
+    
+  public func dummyMethodToEnforceBundling() {
+    get_rgba();
+    free_rgba(nil);
+    get_by_name("", "");
+    set_by_name("", "");
+  }
+}