Ah, sorry I misunderstood your question...
No I don't think there are any ways to get rid of the fog of war. There are no spells that do it either, AFAIK.
You could always play at 640x480, but I think it's just supposed to represent the line of sight of the character.
What confuses me is that it doesn't appear in screenshots, do you mean the fog of war appears when you scroll away from your character?
I checked- there is a skill called Elven Sight that you can pile points into which will extend your character's line of sight

. I'm not sure when you first have access to it though. It may be a few levels.