[FIX] website_sale: remove unused description xpath.

Invisible on group description is removed at: https://github.com/odoo/odoo/commit/cca864f5091f72eb7e766fa263ad9599188364a5#diff-92af3e72f90045de4a079$

so xpath to make it visible is useless now so removed unused xpath
from product template view.

Task-2150643

closes odoo/odoo#41308

Closes: #41308
Related: odoo/enterprise#7137
Signed-off-by: Damien Bouvy (dbo) <dbo@odoo.com>

addons/website_sale/views/product_views.xml

@@ -81,9 +81,6 @@
         <field name="inherit_id" ref="product.product_template_form_view"/>
         <field name="arch" type="xml">
             <!-- add state field in header -->
-            <xpath expr="//group[@name='description']" position="attributes">
-                <attribute name="invisible">0</attribute>
-            </xpath>
             <div name="button_box" position="inside">
                 <field name="is_published" widget="website_redirect_button" attrs="{'invisible': [('sale_ok','=',False)]}"/>
             </div>