What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
Your form is currently integrated to Facebook. To remove the Integration, simply edit your form into our form builder. Click "Setup & Embed" > Click "Integrations" button > Other tab and click "Fit Forms"
Then click "Remove Integration" button:
That should remove the FB Login Button and bring back the submit button.
Having fb login in forum is very useful. It will avoid users filling up the forms. Not sure why you want to remove facebook integration. If that is what you want, then you can follow the above mentioned steps.