Remove obsolete line

src/wagtail_personalisation/forms.py

@@ -7,7 +7,6 @@ from django.contrib.auth import get_user_model
 from django.contrib.auth.models import AnonymousUser
 from django.templatetags.static import static
 from django.test.client import RequestFactory
-# from django.utils.lru_cache import lru_cache
 from django.utils.translation import ugettext_lazy as _
 from wagtail.admin.forms import WagtailAdminModelForm