update IterableHelper in sample app

Author: [email protected]

sample-apps/swiftui-sample-app/swiftui-sample-app/IterableHelper.swift

@@ -8,15 +8,14 @@ import IterableSDK
 class IterableHelper {
     // Please replace with your API key
     #error("Please add your API Key here")
-    private static let apiKey = "1d38cefe0f08466e8d87ac1e80363c82"
+    private static let apiKey = ""
 
     static func initialize(launchOptions: [UIApplication.LaunchOptionsKey : Any]?) {
         let config = IterableConfig()
         // urlDelegate and customActionDelegate must be strong references
         // otherwise they will be deallocated
         config.urlDelegate = urlDelegate
         config.customActionDelegate = customActionDelegate
-        config.dataRegion = IterableDataRegion.EU
         IterableAPI.initialize(apiKey: apiKey,
                                launchOptions: launchOptions,
                                config: config)