Remove Journal.update_posted feature
This options is forbidden in many countries. It is always easier to add a feature with a custom module than to remove.
Also it is a general bad accounting practice to update posted move even if it is allowed in the country.
So it is better to remove the feature.
PS: this will allow to be more compliant with the French law: https://groups.google.com/d/msgid/tryton-fr/566914AD.7010406%40netbsd.org