old_contents: # -*- coding: utf-8 -*-
  from __future__ import unicode_literals
  from collections import defaultdict
  
  from django.db import migrations
  
  def backwards(apps, schema_editor):
      """
      Migration nullified after squash of papers
      """
      pass
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('publishers', '0001_initial'),
      ]
  
      operations = [
          migrations.RunPython(backwards, backwards),
      ]
  
new_contents: # -*- coding: utf-8 -*-
  from __future__ import unicode_literals
  
  from django.db import migrations
  
  def backwards(apps, schema_editor):
      """
      Migration nullified after squash of papers
      """
      pass
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('publishers', '0001_initial'),
      ]
  
      operations = [
          migrations.RunPython(backwards, backwards),
      ]
  
subject: Fix unused imports