Aaah! Another case of a WYSIWYG editor producing WYSINWYW (What You See Is Not What You Want) code/results.
document.getElementById('settingsButton').style.display = 'none';
document.getElementById('settingsPane').style.display = 'none';
document.getElementById('settingsPaneHeader').style.display = 'none';
document.getElementById('settingsPaneInner').style.display = 'none';
Copy/paste into the editor and see what happens.
A couple of caveats:
2) Just because the <div>s in question don't appear on the form doesn't mean that the value for that input won't be sent. In fact, it probably will whether or not you need it.