title: Unregister push notification when user deletes the app
body: <p>I am stucked in starnge kind of situation that In my app I have push notifications. When user deletes the a app and reinstall some how push notification resumes and start receiving to user before he gets register.</p>
  
  <p>I have all code of push notification after registration. Is there any way to unregister push notification when user deletes the app.</p>
  
  <p>Even user don't open the app and he start getting the push notifications.</p>