You are correct, Tennessee taxes only dividend and interest income. If you do not have this type of income you are not required to file a state return.
As long as you have not paid for the state return, you can remove it. See below link.
https://ttlc.intuit.com/replies/3301384
If you already paid for the state return, see link below.
https://ttlc.intuit.com/questions/1899263
