def generate_removed_fields(self):
        """
        Fields that have been removed.
        """
        for app_label, model_name, field_name in sorted(self.old_field_keys - self.new_field_keys):
            self._generate_removed_field(app_label, model_name, field_name)
dataset/ETHPy150Open django/django/django/db/migrations/autodetector.py/MigrationAutodetector.generate_removed_fields/original