Disable StoreKit testing by default

packages/in_app_purchase/in_app_purchase/example/README.md

@@ -60,18 +60,27 @@ below.
 
 ### iOS
 
-When using Xcode 12 and iOS 14 or higher you can run the example in the simulator without having to
-configure an App in App Store Connect. The example app is set up to use StoreKit Testing configured
+When using Xcode 12 and iOS 14 or higher you can run the example in the simulator or on a device without 
+having to configure an App in App Store Connect. The example app is set up to use StoreKit Testing configured
 in the `example/ios/Runner/Configuration.storekit` file (as documented in the article [Setting Up StoreKit Testing in Xcode](https://developer.apple.com/documentation/xcode/setting_up_storekit_testing_in_xcode?language=objc)).
 To run the application take the following steps (note that it will only work when running from Xcode):
 
 1. Open the example app with Xcode, `File > Open File` `example/ios/Runner.xcworkspace`;
 
-2. Select the device you want to run the example App on;
+2. Within Xcode edit the current scheme, `Product > Scheme > Edit Scheme...` (or press `Command + Shift + ,`);
 
-3. Run the application using `Product > Run` (or hit the run button).
+3. Enable StoreKit testing:
+  a. Select the `Run` action;
+  b. Click `Options` in the action settings;
+  c. Select the `Configuration.storekit` for the StoreKit Configuration option.
 
-When testing on pre-iOS 14 you will need to take the following steps:
+4. Click the `Close` button to close the scheme editor;
+
+5. Select the device you want to run the example App on;
+
+6. Run the application using `Product > Run` (or hit the run button).
+
+When testing on pre-iOS 14 you can't run the example app on a simulator and you will need to configure an app in App Store Connect. You can do so by following the steps below:
 
 1. Follow ["Workflow for configuring in-app
    purchases"](https://help.apple.com/app-store-connect/#/devb57be10e7), a

packages/in_app_purchase/in_app_purchase/example/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme

@@ -69,9 +69,6 @@
             ReferencedContainer = "container:Runner.xcodeproj">
          </BuildableReference>
       </BuildableProductRunnable>
-      <StoreKitConfigurationFileReference
-         identifier = "../Runner/Configuration.storekit">
-      </StoreKitConfigurationFileReference>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Release"