old_contents: # -*- coding: utf-8 -*-
  import datetime
  
  from django.core.management.base import BaseCommand
  
  from ...tasks import DeleteOldData
  
  
  class Command(BaseCommand):
  
      help = 'Deletes public diagnosis that are more than a day old'
  
      def handle(self, *args, **options):
          DeleteOldData().run()
  
new_contents: # -*- coding: utf-8 -*-
  from django.core.management.base import BaseCommand
  
  from ...tasks import DeleteOldData
  
  
  class Command(BaseCommand):
  
      help = 'Deletes public diagnosis that are more than a day old'
  
      def handle(self, *args, **options):
          DeleteOldData().run()
  
subject: remove unused import