[SignTorch]

you could remove all product attributes

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or to hide all tabs and tab content, put this in custom.css (then description uses full container width)

.product-details-tabs .tabs {display:none;}

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or an easy way to selectively remove the specifications tab, run this SQL

UPDATE xc_products SET attrSepTab = 0;

then copy

skins/default/en/product/details/parts/common.product-main-attributes.tpl

to custom_skin and comment out the {*<ul> ... </ul>*} tags

that hides the attributes and any group titles on any products where attrSepTab is 0

that way you could show the specifications tab on some products by setting attrSepTabs to not 0 on certain products

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to just globally hide the specs tab you could decorate getTabs() in

classes/XLite/View/Product/Details/Customer/Page/APage.php

with something like this (untested)

if($id!="specification")
$list[$k] = array(
    'index'  => $i,
    'id'     => 'product-details-tab-' . $id,
    'name'   => is_array($data) && !empty($data['name']) ? $data['name'] : $k,
    'weight' => isset($data['weight']) ? $data['weight'] : $i,
);