remove TODO from external_source.yaml

deployment/hasura/metadata/databases/tables/merlin/external_source.yaml

@@ -42,17 +42,6 @@ insert_permissions:
     permission:
       columns: [key, source_type_name, valid_at, start_time, end_time, metadata, derivation_group_name, created_at]
       check: {}
-# TODO: We **should** allow user and admin to change the derivation group name to re-link a source to a new derivation group, but maybe in the future as we've pushed off creating
-#       a UI element to change derivation group to a later batch of work
-#update_permissions:
-#  - role: aerie_admin
-#    permission:
-#      columns: [derivation_group_name]
-#      filter: {}
-#  - role: user
-#    permission:
-#      columns: [derivation_group_name]
-#      filter: {}
 delete_permissions:
   - role: aerie_admin
     permission: