[FIX] mrp: test race condition issue

assertRaise do not rollback and continue with a broken cursor
which could cause problem during the remaining part of the test.

closes odoo/odoo#37421

Signed-off-by: Arnold Moyaux <amoyaux@users.noreply.github.com>

addons/mrp/tests/test_order.py

@@ -597,8 +597,6 @@ class TestMrpOrder(TestMrpCommon):
             'mo_id': mo.id,
             'product_qty': 3,
         })
-        with self.assertRaises(UserError):
-            update_quantity_wizard.change_prod_qty()
 
         mo.move_raw_ids.filtered(lambda m: m.state != 'done')[0].quantity_done = 0
         update_quantity_wizard.change_prod_qty()