diff --git a/django/db/models/fields/related.py b/django/db/models/fields/related.py
index 5a173b6fa5..f9b913ae50 100644
--- a/django/db/models/fields/related.py
+++ b/django/db/models/fields/related.py
@@ -1,5 +1,3 @@
-import copy
-
 from django.db import connection, transaction
 from django.db.models import signals, get_model
 from django.db.models.fields import AutoField, Field, IntegerField, PositiveIntegerField, PositiveSmallIntegerField, get_ul_class