TRestProcessRunner::fOutputEventStorage does not do what it is supposed to do

[jgalan]

Before we could detach the event tree from the final produced file in order to release storage weight into the final file. I think this was managed through a metadata member inside TRestProcessRunner::fOutputEventStorage.

Now if I have a look to what this metadata member is doing I simply see that is doing nothing.

There is this rest-forum thread where we discussed about this.

https://rest-forum.unizar.es/t/behaviour-of-inputanalysis-inputevent-and-outputevent-in-trestprocessrunner/187/3

Hard for me to track when this feature disappeared.