How to delete an action on a Record Type?

Is there an option to delete an unused action?

I was following the tutorial and adding a new action on Record Type.
I realized, that I chose the wrong option, and created the action without auto-generated Process Model and Interface.
I didn't know how to remove the action, so I thought, that maybe if I remove the empty Process Model and Interface associated
with the action, it would dissapear. Doing that however only made things worse, as now I couldn't create a new action, due to
an error on the existing one (Process Model not found), so I had to put it back in.

Now I have two actions, one of which is not needed. How do I delete it?