code: def drop_field(app_name, model_name, field_name):
      
      app_config = apps.get_app_config(app_name)
      model = app_config.get_model(model_name)
      field = model._meta.get_field(field_name)
      with connection.schema_editor() as schema_editor:
          schema_editor.remove_field(model, field)
docs: Drop the given field from the app's model