diff --git a/src/wagtail_personalisation/models.py b/src/wagtail_personalisation/models.py
index 0b49785..e375acc 100644
--- a/src/wagtail_personalisation/models.py
+++ b/src/wagtail_personalisation/models.py
@@ -5,12 +5,9 @@ from django.template.defaultfilters import slugify
 from django.utils.encoding import python_2_unicode_compatible
 from django.utils.functional import cached_property
 from django.utils.translation import ugettext_lazy as _
-from modelcluster.fields import ParentalKey
 from modelcluster.models import ClusterableModel
-from wagtail.utils.decorators import cached_classmethod
 from wagtail.wagtailadmin.edit_handlers import (
-    FieldPanel, FieldRowPanel, InlinePanel, MultiFieldPanel, ObjectList,
-    PageChooserPanel, TabbedInterface)
+    FieldPanel, FieldRowPanel, InlinePanel, MultiFieldPanel)
 from wagtail.wagtailcore.models import Page
 
 from wagtail_personalisation.rules import AbstractBaseRule
diff --git a/src/wagtail_personalisation/wagtail_hooks.py b/src/wagtail_personalisation/wagtail_hooks.py
index 6ca93ac..06c44bb 100644
--- a/src/wagtail_personalisation/wagtail_hooks.py
+++ b/src/wagtail_personalisation/wagtail_hooks.py
@@ -13,7 +13,6 @@ from wagtail.wagtailcore import hooks
 from wagtail_personalisation import admin_urls, models
 from wagtail_personalisation.adapters import get_segment_adapter
 from wagtail_personalisation.models import PersonalisablePageMixin, Segment
-from wagtail_personalisation.utils import impersonate_other_page
 
 logger = logging.getLogger(__name__)