Migration for index removal.

lms/djangoapps/courseware/migrations/0006_remove_module_id_index.py

@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.13 on 2018-05-27 16:27
+from __future__ import unicode_literals
+
+from django.db import migrations
+import opaque_keys.edx.django.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('courseware', '0005_orgdynamicupgradedeadlineconfiguration'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='studentmodule',
+            name='module_state_key',
+            field=opaque_keys.edx.django.models.UsageKeyField(db_column=b'module_id', max_length=255),
+        ),
+    ]