Hello, component hasn't option to disable it.
You can edit code in your own.
Open file
components/com_booking/views/subject/tmpl/default_prices.php
There is row
79 looks like:
<div class="hasTip price price<?php echo $priceIndex; ?>" title="<?php echo $this->escape($price->formatPrice) . '::' . $this->escape($title); ?>"><?php echo $price->formatPrice; ?><?php echo count($discounts) ? '<br/>' . implode('<br/>', $discounts) : ''; ?></div>
you should delete CSS class .hasTip and title param
<div class="price price<?php echo $priceIndex; ?>"><?php echo $price->formatPrice; ?><?php echo count($discounts) ? '<br/>' . implode('<br/>', $discounts) : ''; ?></div>