Fix a bug introduced by 67901a4429c69fbba96c32af5d8f58aff54f0be5 When an expense is submitted and for the steps after, there is no need to recompute the product_cost as it may be confusing or generate discrepancies with the account move by changing the totals. task-3580004 closes odoo/odoo#155277 X-original-commit: 2427ac03806205f45084640c301b3dfb9011c22c Signed-off-by: Olivier Colson (oco) <oco@odoo.com> Signed-off-by: Julien Alardot (jual) <jual@odoo.com>