#17 Update setup

* removes unused organisation app from project
* removes null=True parameters for M2M fields in models

intervention/models.py

@@ -161,7 +161,6 @@ class LegalData(UuidModel):
     )
     laws = models.ManyToManyField(
         KonovaCode,
-        null=True,
         blank=True,
         limit_choices_to={
             "code_lists__in": [CODELIST_LAW_ID],