Delete workflows / individual states Strangly I seem not to be able to delete an existing workflow as a whole, nor a state within a workflow. The admin user has all the necessary permission. No content type is assigned with the workflow. What do I not see?
In Drupal 8 (at least), there is a "Clean up" tab in the main configuration screen of the module (/admin/config/workflow/workflow), where you can delete inactive states.

In my case, I suddenly stopped seeing the "Actions" buttons, so the only thing I could do was activate/disactivate the states.  

That may solve someone's problem...It solved mine