My university provides every student living on-campus with a Bible, both testaments. It's part of your inventory, so selling it or whatever you feel is appropriate for the book is a no-no if you plan on getting your deposit back at the end of the year. The institution has a Christian foundation, and there's actually an old chapel on campus that really stands out as the symbol for this.
I definitely wouldn't call this prejudice though, not even in your case, provided you were being at least half-serious in some way. I'm pretty sure the library here has copies of other scriptures (and other religiously based material that strictly aren't examples of scriptures), and like people have said, you should check yours if the presence of a Bible bothers you that much. The lack of a Satanic Bible, like what's also been said, is hardly surprising if you look at the numbers in organised religion and the functions they can fulfill.
Besides, libraries have so much information within them. There's no way you could be forced to use the religiously-based material in your own time, unless of course, the school is doing that. That's the sort of thing I have qualms about, but it's there if anyone wants to use it in the meantime. I mean, I've used my bible a few times since I moved here for different reasons, but it's not the book I grab off the shelf every day. For the past two days, that's been Fight Club's honour.