There’s currently no such an option available.
Deleting an image from the editor does not remove it from the server, this would require a separate server action which checks files in the folder in a database table and checks if they are there.
Another solution would be to add additional step in the image upload server action and store the uploaded image name/location in a relational database table and link it to the record id.
Then when deleting a record, delete all the images related to it 
Maybe if you can suggest any better workflow, @patrick can look into integrating such a behavior.