[FIX] point_of_sale: fix included taxes
[FIX] point_of_sale: fix included taxes

The unit_price should be already 'fixed' by the time we get in
`_compute_amount_line_all`.

This reverts commit d938ba87ae524ab10a1da43471962f10ed53b9ca.

Elico-Corp/odoo_OCB,ygol/odoo,Elico-Corp/odoo_OCB,Elico-Corp/odoo_OCB,ygol/odoo,ygol/odoo,Elico-Corp/odoo_OCB,ygol/odoo,ygol/odoo,ygol/odoo,Elico-Corp/odoo_OCB,Elico-Corp/odoo_OCB,ygol/odoo