Why is the bank bonus removed from the Financial Trait?

[vradev]

Hello,
I just installed the latest patch for Civ4 (1.61) and I noticed that the double speed production bonus for Banks is removed from the Financial Trait.
It seems a bit unfair why all the other traits should have bonuses in building production but the Financial trait won't.
Does anyone know of a good reason why they did this?
Thanks.

[Solver]

Well, balance. Financial trait is already hugely powerful. It's definitely the best builder trait. If you get, say, the Colossus, you have an uber economy. Going heavy on cottages also is awesome... it's just better than the other traits, so it needs the bonus removed to make it balanced.

[Silver14]

I'd rather have the bank nerfed then for them to have changed it to +1 on tiles producing 3 or more gold instead of 2. Which may be the more practical nerf for Financial but would have generated large amounts of fussing.