<div class="attribute-pdf">
<p>
<a href={concat('/content/pdf/',$node.node_id)|ezurl}>{'application/pdf'|mimetype_icon( small, "Download PDF"|i18n( "design/base" ) )} {"Download PDF version of this page"|i18n( "design/base" )}</a>
</p>
</div>
from your article template (<i><designdir></i>/override/templates/full/article.tpl) will do the trick of removing that link from all articles / newsitems (don't forget to flush your caches)
