New Process Dataset Sets management

closes #1719 (closed)

requires !2256 (merged)

arkindex/process/migrations/0032_processdatasetset_model.py

@@ -36,7 +36,6 @@ class Migration(migrations.Migration):
             ) p
             INNER JOIN training_datasetset AS dss ON (dataset_id = dss.dataset_id AND set = dss.name)
             """,
-            reverse_sql=migrations.RunSQL.noop,
         ),
         migrations.RemoveField(
             model_name="process",