[REM] sale: remove field for digital sales
[REM] sale: remove field for digital sales

That field is used only by the e-commerce module (`website_sale`), so it
shouldn't be here.

This is a continuation of 6afec6b6b8d2.

closes odoo/odoo#37942

Signed-off-by: Adrian Torres (adt) <510911ca0904df843254643ba27120ccabfde1b1@odoo.com>

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo