Fixes #4560: remove LDIF dump of inventories when received

We can notice that the texte on the property file was not accurate, as now we have the historization needed to see the state of the node when accepted/refused done at that moment, see: https://github.com/Normation/rudder/blob/master/rudder-core/src/main/scala/com/normation/rudder/services/servers/NewNodeManager.scala#L869 
(so actually, we can remove that "feature" and keep the possibility to see the node)