For version 2.2 add the line below to the CSS file, layout.css
h2.headingblock.header.outline{display:none;}
Alternatively, if you theme supports CSS, go to the theme option and add it there.
OR you can also add the line into the Header under 'Additional HTML' using
<STYLE TYPE="text/css">
<!--
h2.headingblock.header.outline{display:none;};
-->
</STYLE>
Hope this helps