Added style tags in html, can't remove them

So, my problem is, for some reason, this is added in html:
<style>


    .product-details-page .product-specs-box {
        display: none;
    }
    .product-details-page .ui-tabs .product-specs-box {
        display: block;
    }
    .product-details-page .ui-tabs .product-specs-box .title {
        display: none;
    }
    
</style>

Is there some setting in nop that does this or its something else?
Thanks in advance

Problem solved, it was nop-templates quick tabs plugin that made mess, it doesn't work properly so we couldn't know that it was caused by them

Hello fun123,

actually, our plugin hides only the parts of the product page which you have specifically set to appear in a tab.

It renders another instance of the content in a tab and then hides the original. This is the way it normally functions since we cannot alter the markup of the Default Clean theme, we can only hide it.

You had enabled your Enable Product Specifications Tab setting and then expected to have the original content also visible, which wouldn't be proper behavior.

Best regards,
Valentin.