EcoAccount fixes

* adds deductable surface field into NewEcoAccountForm directly
* removes custom manager for LegalData and ResponsibilityData

intervention/managers.py

@@ -23,26 +23,3 @@ class InterventionManager(models.Manager):
         ).prefetch_related(
             "users",
         )
-
-
-class LegalDataManager(models.Manager):
-    """ Holds default db fetch setting for this model type
-
-    """
-    def get_queryset(self):
-        return super().get_querset().select_related(
-            "process_type",
-        ).prefetch_related(
-            "laws"
-        )
-
-
-class ResponsibilityDataManager(models.Manager):
-    """ Holds default db fetch setting for this model type
-
-    """
-    def get_queryset(self):
-        return super().get_querset().select_related(
-            "registration_office",
-            "conservation_office",
-        )