[FIX] l10n_eu_service: no reset of install wizard state

Hardcoding the state to `open` is useless as it is the
default state, and forces the state to reset upon every
update, which is annoying.

addons/l10n_eu_service/wizard/wizard.xml

@@ -59,7 +59,6 @@
         <record id="open_l10n_eu_service" model="ir.actions.todo">
             <field name="action_id" ref="action_eu_service"/>
             <field name="type">automatic</field>
-            <field name="state">open</field>
         </record>
 
         <record id="view_account_config_settings_inherit" model="ir.ui.view">