Fix migration scripts

core/migrations/0013_auto_20161209_2338.py

@@ -25,9 +25,4 @@ class Migration(migrations.Migration):
             name='viewed',
             field=models.BooleanField(verbose_name='viewed', default=False),
         ),
-        migrations.AlterField(
-            model_name='notification',
-            name='type',
-            field=models.CharField(verbose_name='type', default='GENERIC', choices=[('FILE_MODERATION', 'New files to be moderated'), ('SAS_MODERATION', 'New pictures/album to be moderated in the SAS'), ('NEW_PICTURES', "You've been identified on some pictures"), ('REFILLING', 'You just refilled of %(amount)s €'), ('SELLING', 'You just bought %(selling)s'), ('GENERIC', 'You have a notification')], max_length=32),
-        ),
     ]