Hi,

To remove the banner from Helpdesk, you have to inherit the XML kanban view of the "helpdesk.team" model and remove the "js_class" attribute from the kanban tag.

To do that you can try this code:

<record id="your_xml_id" model="ir.ui.view">

   <field name="name">your_xml_name</field>

   <field name="model">helpdesk.team</field>

   <field name="inherit_id" ref="helpdesk.helpdesk_team_view_kanban"/>

   <field name="arch" type="xml">

        <xpath expr="//kanban" position="attributes">

            <attribute name="js_class">0</attribute>

        </xpath>

   </field>

</record>

Regards