How can I remove content from being sent back to the person that filled out the form?

As far as I understand, you do not want to send email notification to your respondents. If this is correct, you need to delete tha Autoresponder email template.

Here is our guide: How-to-Delete-Notifications-Autoresponder

Please make sure that you delete Autoresponder email (green one), which is sent to form respondents: Explanation-of-Email-Notification-and-Autoresponder-Settings

Let us know if you need more help.