In the head.tpl template look for the following snippet of code near the end and comment out using the {* *}
Code:
{*<TR>
<TD colspan=2 class=NumberOfArticles align=right>{insert name="productsonline"} {$lng.lbl_products} {if $config.Appearance.show_in_stock eq "Y"}{$lng.lbl_and} {insert name="itemsonline"} {$lng.lbl_items} {/if}{$lng.lbl_online}</TD>
</TR>*}