In SharePoint 2010, all you need to do, in order to make the Quick Launch NOT show on any particular page, is to inclue this snippet on that page:

<style type="text/css">
#s4-leftpanel {  display:none; }
.s4-ca {  margin-left: 5px;  background: transparent; }

If you need it removed on every page, just include those styles in your core4.css stylesheet.