yo lo hice modificando las siguientes lineas en el html
es a partir de la linea 2380
<!--
para eliminar el autor
-->
<div class='date-header'>
<!--
<div id='meta-post'>by <span class='reviewer'><data
ost.author/></span>
-->
<br/><a class='timestamp-link' expr:href='data
ost.url' rel='bookmark' title='permanent link'>Hora <abbr class='published timeago' expr:title='data
ost.timestamp' itemprop='datePublished'><data
ost.timestamp/></abbr></a></div>
<!--
<br/><a class='timestamp-link' expr:href='data
ost.url' rel='bookmark' title='permanent link'>about <abbr class='published timeago' expr:title='data
ost.timestamp' itemprop='datePublished'><data
ost.timestamp/></abbr></a>
-->
<b:if cond='data
ost.dateHeader'>
<script>var mismaFecha = '<data
ost.dateHeader/>';</script>
<h2 class='date-header'><data
ost.dateHeader/></h2>
<b:else/>
<h2 class='date-header'>
<script>document.write(mismaFecha);</script>
</h2>
</b:if>
<!--
</div>
-->