diff --git a/django/db/models/fields/__init__.py b/django/db/models/fields/__init__.py
index b9f320c0e0..6eed25d96a 100644
--- a/django/db/models/fields/__init__.py
+++ b/django/db/models/fields/__init__.py
@@ -730,9 +730,6 @@ class Field(RegisterLookupMixin):
             return None
         return ""
 
-    def get_validator_unique_lookup_type(self):
-        return '%s__exact' % self.name
-
     def get_choices(self, include_blank=True, blank_choice=BLANK_CHOICE_DASH, limit_choices_to=None):
         """Returns choices with a default blank choices included, for use
         as SelectField choices for this field."""
diff --git a/django/db/models/fields/related.py b/django/db/models/fields/related.py
index 428acd690d..b52d59394d 100644
--- a/django/db/models/fields/related.py
+++ b/django/db/models/fields/related.py
@@ -1787,9 +1787,6 @@ class ForeignKey(ForeignObject):
         column = self.db_column or attname
         return attname, column
 
-    def get_validator_unique_lookup_type(self):
-        return '%s__%s__exact' % (self.name, self.related_field.name)
-
     def get_default(self):
         "Here we check if the default value is an object and return the to_field if so."
         field_default = super(ForeignKey, self).get_default()