Hi,

Either you can delete that rule or you can set active False for that record. Both can be done from UI or from Code.

Setting active False:

<record id="base.res_partner_rule_private_employee" model="ir.rule">
    <field name="name">res.partner.rule.private.employee</field>
    <field name="active" eval="False"/>
</record>

Deleting the rule:

<delete id="base.res_partner_rule_private_employee" model="ir.rule"/

Thanks