Removed usage of deprecated django.utils.importlib.

from django.apps import apps

from django.db import models

from django.db.migrations.loader import MigrationLoader

from django.utils import datetime_safe, six, importlib

from django.utils import datetime_safe, six

from django.utils.encoding import force_text

from django.utils.functional import Promise

            # Python 2/fallback version

            module_name = value.__module__

            # Make sure it's actually there and not an unbound method

            module = importlib.import_module(module_name)

            module = import_module(module_name)

            if not hasattr(module, value.__name__):

                raise ValueError(

                    "Could not find function %s in %s.\nPlease note that "