How do I take a submit button off a form?

Using CSS is the easiest way remove a submit button from your form. This isn't recommended as it will mean submitting your form is no longer possible, but to hide your form's submit button add the following CSS to your theme's style.css file (or some other location your theme recommends making CSS changes to):
#frm_form_213_container input[type="submit"] {display:none;}
You will need to replace the 213 with the ID of the form on which you need the submit button hidden.