Issues with Using the Feedback Service
If you remove your apps from your device or computer and then send a push notification to it, you would expect to the Device token rejected, and the invalidated device token should appear on the feedback service. However, if this is the last Push-enabled app on the device or computer, it'll not show up in the feedback service. This was because deleting the last app tears down the persistent connection to the push service before the notice of the de Letion can be sent.
You can work around the leaving for least one push-enabled app on the device or computer in order to keep the Persisten T connection up. To keep the persistent connection to the production environment up, just install any free push-enabled apps from the app St Ore and you should then is able to the delete your app and see it appear in the feedback service.
Recall that each push environment have its own persistent connection. So-keep the persistent connection to the sandbox environment up, install another development push-enabled app.
Issues with Apple push feedback