diff --git a/django/contrib/gis/db/backends/postgis/schema.py b/django/contrib/gis/db/backends/postgis/schema.py
index 46e438acaa..181826789b 100644
--- a/django/contrib/gis/db/backends/postgis/schema.py
+++ b/django/contrib/gis/db/backends/postgis/schema.py
@@ -1,6 +1,4 @@
-from django.conf import settings
 from django.db.backends.postgresql_psycopg2.schema import DatabaseSchemaEditor
-from django.utils.functional import cached_property
 
 
 class PostGISSchemaEditor(DatabaseSchemaEditor):
diff --git a/django/contrib/gis/db/models/fields.py b/django/contrib/gis/db/models/fields.py
index b5cdc72c29..734f805c8d 100644
--- a/django/contrib/gis/db/models/fields.py
+++ b/django/contrib/gis/db/models/fields.py
@@ -112,9 +112,9 @@ class GeometryField(Field):
         kwargs['srid'] = self.srid
         if self.dim != 2:
             kwargs['dim'] = self.dim
-        if self.spatial_index != True:
+        if self.spatial_index is not True:
             kwargs['spatial_index'] = self.spatial_index
-        if self.geography != False:
+        if self.geography is not False:
             kwargs['geography'] = self.geography
         return name, path, args, kwargs