This might do the trick:
Yes, it says "java", but it works in Flash Builder, so it may work in Coldfusion Builder just as well.
Afterall they're all just Eclipse variants.
I appreciate the link, however after following those tips and opening up a ColdFusion file, the tooltips are still there.
Yup you're right. Doesn't work for ColdFusion and if a similar option like the one for Java isn't available under the ColdFusion preferences I'm afraid there's no way to turn it off.
In that case you could file an enhancement request.
In case you do, post it here so people can vote for it