增加升级 announcement 的 migration

announcement/migrations/0004_auto_20151015_1555.py

@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('announcement', '0003_auto_20150922_1703'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='announcement',
+            name='groups',
+        ),
+        migrations.RemoveField(
+            model_name='announcement',
+            name='is_global',
+        ),
+    ]