AdminCP->Styles and Templates->Style Manager->Your Skin->Edit Templates-> Member Info Templates-> MEMBERINFO...
Find:
PHP Code:
<div id="profile_tabs">
$template_hook[profile_left_first]
$blocks[visitor_messaging]
$blocks[aboutme]
$blocks[stats]
$blocks[friends]
$blocks[infractions]
$blocks[contactinfo]
$template_hook[profile_left_last]
</div>
Delete:
PHP Code:
$blocks[infractions]