unregister Client
See unregisterClient_(Boolean).
Forget any client registration previously established by {@link com.sap.cloud.mobile.kotlin.odata.DataServiceAsync#registerClient_(com.sap.cloud.mobile.kotlin.odata.EntityValue?) DataServiceAsync.registerClient}.
Also attempts to make a call to the server to delete the associated entity, if the deleteFromServer parameter is true.
Parameters
delete From Server
Specify a value of true to request the server to also delete the corresponding entity.