code: def clear(ctx):
      
      wva = get_wva(ctx)
      for subscription in wva.get_subscriptions():
          sys.stdout.write("Deleting {}... ".format(subscription.short_name))
          sys.stdout.flush()
          subscription.delete()
          print("Done")
docs: Remove all registered subscriptions
  
  Example:
  
  \b
      $ wva subscriptions clear
      Deleting engineload... Done
      Deleting fuelrate... Done
      Deleting throttle... Done
      Deleting rpm... Done
      Deleting speedy... Done
  
  To remove a specific subscription, use 'wva subscription remove <name>' instead.