Bible Template.

How small is your screen? Anyway, something like this should do it:

#pt-newmessages {
  display:none;
}

Oops, actually it's a blue box, and it says "There are new messages for you." which is definitely not true (except in this case!). It's user:human/vector.css I have to edit, right? Thanks...

Now I'm confused, can you upload a screenshot please?

There ya go.

Oh, that only appears on the watchlist, because lqt doesn't work with the watchlist. The code to hide it is:

.lqt_watchlist_messages_notice {
  display:none;
}