wpDiscuz 7 comes with two post rating options. First is a stand-alone post rating system, located under post content and above comment section with rating buttons. You just click on rating stars and rate articles.

Second is based on rating custom fields in comment form. If you’ve already configured the second type (Rating comment field) in comment form, the first type will be automatically disabled. You can enable the first rating type in Comment Form Settings. 

The second type can be managed in Comment Form Builder, where you can add/remove rating custom fields. 

But still, I see a rating on the comment:

How do I get rid of the rating option?

Thanks!