Time UoM are almost Master Data for timesheet modules.
Some user remove those before installing timesheet modules, making
it impossible and crashing (as some field required a time UoM to be
set at installation).
Since we don't want to hardcode xmlids of 'Hours' and 'Days' time
UoM, we rather prevent the deletion of such UoM in the system.
The UoM can be desactivate to avoid having plenty of them in system
in use.
Task #39079
jem-odoo
3592dbd035