title: Removing all Celery results from a Redis backend
body: <p>Is there any way in Celery to remove all previous task results via command line? Everything I can find references <code>purge</code>, but that doesn't seem to be for task results. Other solutions I have found include using a Celery beat which periodically removes it, but I'm looking for a one-off command line solution.</p>
  
  <p>I use Celery 4.3.0.</p>