This should not be do difficult to achieve. What I would suggest is to create yourself a child theme. It is quick and very easy. The reason for this is, never make changes to a theme/plugin that you are not the author of.
Once you have your child theme up and running, copy the page.php template from the parent theme to your child theme and rename it front-page.php (as I suggested in your previous question, go and read about creating a static front page)
Open front-page.php and delete everything comment related. This should be at the bottom of your template. Save this template.
This should be enough