odoo/ext/3rd-party-addons/disable_odoo_online/static/src/xml/base.xml

<?xml version="1.0" encoding="UTF-8"?>
<templates>
    <t t-extend="UserMenu">
        <t t-jquery="a[data-menu='account'], a[data-menu='documentation'], a[data-menu='support']">
            this.parent().remove();
        </t>
    </t>
</templates>