[FIX] stock: remove empty move line
[FIX] stock: remove empty move line

_set_quantity_done_prepare_vals is call to (re)create move line
during some onchange/compute. But it never removed empty line.
Then remove empty line (when no reserved quantity and no done quantity)

task-2278147
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo