It is very likely and old layout override. Your default.php in productdetails view should have something like
foreach ($this->productDisplayTypes as $type=>$productDisplayType) {
foreach ($productDisplayType as $productDisplay) {
foreach ($productDisplay as $virtuemart_method_id =>$productDisplayHtml) {
?>
<div class="<?php echo substr($type, 0, -1) ?> <?php echo substr($type, 0, -1).'-'.$virtuemart_method_id ?>">
<?php
echo $productDisplayHtml;
?>
</div>
<?php
}
}
}
this code block is usually below
echo shopFunctionsF::renderVmSubLayout('rating', array('showRating' => $this->showRating, 'product' => $this->product));