Here was my first response to you: Removing specific contact list
I didn't ask you "for support of the Gmail plug-in existence." I said you obviously did more than just setup your gmail address in BIS, and it turns out I was correct. I said I don't use google and don't know exactly what you might have done ... Google app, google plug-in, I don't know the difference; but you did it, whichever it is. My suggestion was undo it, remove it, delete it, whatever, or else the extra database on the device will be recreated again after you delete it, and I was correct.
I can't tell you how to undo what you have done because I don't know, and I would be disinclined to help you at this point anyway. I wouldn't want to waste your time.