slapos_erp5: Preference for payzen and wechat isnt mandatory

  No need to always set those properties, while no accounting is setup.

  Let the project introduce it if they rely on those payment modes.

master/bt5/slapos_erp5/SkinTemplateItem/portal_skins/slapos_erp5/SystemPreference_checkSystemPreferenceConsistency.py

@@ -36,10 +36,6 @@ if not [x for x in subscription_assignment_category_list if x.startswith('destin
 
 preference_method_list = [
   "getPreferredHateoasUrl",
-  "getPreferredPayzenPaymentServiceReference",
-  "getPreferredPayzenIntegrationSite",
-  "getPreferredWechatPaymentServiceReference",
-  "getPreferredWechatIntegrationSite"
   ]
 
 for method_id in preference_method_list: