Remove externallink field from Mailinglist model

This is not used for anything...

pgweb/lists/migrations/0003_remove_list_externallink.py

@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('lists', '0002_listname_unique'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='mailinglist',
+            name='externallink',
+        ),
+    ]