I don't know that anything is a good sub for it, but you can leave it out. It's just a bit less sweet and more of a dry tobacco without it.
You could try some TFA Smooth ( like 0.5% ) to round it out a bit. Or maybe something like a FA Fresh Cream at 0.5%.
Really any cream that pairs well with Shisha Vanilla should work well, just try to stay away from Vanilla creams.