[FIX] removed onchange on a field. The onchange was not existing anymore

addons/base_vat/base_vat_view.xml

@@ -10,7 +10,7 @@
                 <field name="property_account_position_id" position="after">
                     <label for="vat"/>
                     <div name="vat_info" class="o_row">
-                        <field name="vat" on_change="vat_change(vat)" placeholder="e.g. BE0477472701"/>
+                        <field name="vat" placeholder="e.g. BE0477472701"/>
                         <button name="button_check_vat" string="Check Validity" class="oe_link" type="object" icon="fa-cog"/>
                     </div>
                 </field>