title: iOS push notification to remove delivered notification
body: <p>I'm working on a app project that uses react-native and FCM Push Notification (rnfirebase 5.6.x).
  I send a notification when the user receives some message and I need to remove that delivered notification if the user reads that message on another source (like our web app).</p>
  
  <p>With the app open or in background, I can send another push with some userInfo to let me know what I need to remove.</p>
  
  <p>Everything is working perfect... Except when the user kill the app. Then I have no control on the received notification...</p>
  
  <p>I tried the use the tag prop on the notification data, but according with firebase, it is for Android only.</p>
  
  <p>Any ideas on how to do that?</p>