You can't get rid of the comment area altogether. I'm assuming that comment box is being added automatically with our content plugin. If so, you can configure how many comments are shown by default in the JFBConnect -> Social -> Content Plugin - Comments section.
The setting you're looking for is "Number of Comments". The minimum value you can set that to is '1', which will show 1 comment along with a "Show more comments" button for the user to expand the comment area and show more of the comments on the page.
I hope that helps explain, but if you're looking for something else, just let me know.
Thanks,
Alex