Hi Aymenisio,

You can remove this with an inherited view. In this view create an xpath expression to remove the "control" element of the tree:

<record id="custom_sale_order_form_view" model="ir.ui.view">
    <field name="inherit_id" ref="sale.view_order_form"/>
    <field name="model">sale.order</field>
    <field name="arch" type="xml">
        <xpath expr="//tree/control" position="replace">
        </xpath>
    </field>
</record>

Tip: In the upcoming V13 it will be even easier to remove parts of the control. I've made an improvement so that all the controls have a name to xpath on. See https://github.com/odoo/odoo/pull/30711/files

Regards,
Yenthe

Remove create tag which you don't need.
https://github.com/odoo/odoo/blob/12.0/addons/sale/views/sale_views.xml#L388