title: Parse installation deleteInBackground()
body: <p>and I am using installations for push notifications. </p>
  
  <p>I am trying use a func to delete all channels on a installation, without using removeObject, since then the apps bugs out while being online since it will be storing addUniqueobject and removeObject without saving in the background. I tried using. </p>
  
  <pre><code>let currentInstallation = PFInstallation.currentInstallation()
                 currentInstallation.deleteInBackground() 
  </code></pre>
  
  <p>but it doesn't remove the channels from the installation. Does anyone know how to remove all channels from a parse installation? </p>