[hobbit] Do not display "memory"

Hi all, I use a hobbit client on a linux server, but for some reason it doesn't make sense to monitor the memory usage. I can't seem to find a way not to monitore one of the "base" tests of the linux hobbit client, like memory for instance. I could use a "group-except" in the bb-host file, but I don't like the idea of the memory being monitored but not displayed, I'd really like it not to be tested at all. Any idea how to do this ? Thanks. Xavier