Remove Business Area from Cost Assignment

Hi ,

Our client doesn't use Business area in R/3 design so they wanted to remove Business area from displaying off the screen as it is mis-leading to the users.

I have tried using SHD0 transaction code into BBB_SC variant. The only option given over there is to make Cost Assignment push button as Invisible.

Could anyone please advise is there any field by field i can make those invisible?

Thank you in advance

Regards

Ritesh