Please remove the default <hr> that is part of the H2 tag that is used across the edx.org Drupal site.
FYI I think this is probably a Spartans project. Please let me know if you need any additional info.
I also think this is the CSS file: https://prod-edx-mktg-edit.edx.org/sites/default/files/css/css_e-xDDdQSZVInSNOiufhQx9T5MyBQ-kUb8HMwcmh82AE.css
But I may be wrong. This could just be the CSS for the Product Landing Page Templates.