ID: mint_system.sale_margin.sale_margin_sale_order.hide_margin
<data inherit_id="sale_margin.sale_margin_sale_order" priority="50">
<xpath expr="//field[@name='margin']/../../label" position="replace"/>
<xpath expr="//field[@name='margin']/.." position="replace"/>
</data>
Source: snippets/sale_margin.sale_margin_sale_order.hide_margin.xml