admin can delete newsletters

config/sync/user.role.admin.yml

@@ -82,6 +82,7 @@ permissions:
   - 'delete any evenement content'
   - 'delete any fil content'
   - 'delete any page content'
+  - 'delete any simplenews_issue content'
   - 'delete commerce_promotion'
   - 'delete default commerce_order'
   - 'delete terms in assisted_research'