update: add missing migration file

djangoldp/migrations/0002_auto_20190603_1145.py

+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.20 on 2019-06-03 09:45
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('djangoldp', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='ldnotification',
+            name='user',
+        ),
+        migrations.DeleteModel(
+            name='LDNotification',
+        ),
+    ]