Fixed unneeded compatibility import for ForwardManyToOneDescriptor

Author: vdboor

fluent_pages/models/fields.py

@@ -1,7 +1,7 @@
 import django
 from django.db import models
+from django.db.models.fields.related import ForwardManyToOneDescriptor
 from django.utils.translation import gettext_lazy as _
-from fluent_utils.django_compat import ForwardManyToOneDescriptor
 from polymorphic_tree.models import PolymorphicTreeForeignKey
 
 from fluent_pages import forms