Refs #32675 -- Removed to_field from ForeignKeys in contrib apps' migrations.

Refs #22889.

django/contrib/admin/migrations/0001_initial.py

@@ -21,7 +21,6 @@ class Migration(migrations.Migration):
                 ('action_flag', models.PositiveSmallIntegerField(verbose_name='action flag')),
                 ('change_message', models.TextField(verbose_name='change message', blank=True)),
                 ('content_type', models.ForeignKey(
-                    to_field='id',
                     on_delete=models.SET_NULL,
                     blank=True, null=True,
                     to='contenttypes.ContentType',

django/contrib/auth/migrations/0001_initial.py

@@ -19,7 +19,6 @@ class Migration(migrations.Migration):
                 ('content_type', models.ForeignKey(
                     to='contenttypes.ContentType',
                     on_delete=models.CASCADE,
-                    to_field='id',
                     verbose_name='content type',
                 )),
                 ('codename', models.CharField(max_length=100, verbose_name='codename')),

django/contrib/redirects/migrations/0001_initial.py

@@ -14,7 +14,6 @@ class Migration(migrations.Migration):
                 ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
                 ('site', models.ForeignKey(
                     to='sites.Site',
-                    to_field='id',
                     on_delete=models.CASCADE,
                     verbose_name='site',
                 )),