Deleting Demo Data Categories Directly in Database - Managed WordPress

I've deleted all demo data, posts, images, and categories but these categories still keep showing up when I try to add a new post.

 

How do I delete these directly from database?

 

Step-by-Step if possible please. I can access the database from FTP or directly in the browser.

 

 

Demo Categories.PNG

 

 

Thanks

Khan