What are the risks of pregnancy if belly button is removed?

how the heck do you get a belly button removed? Especially if it's an innie?

The same as if you still had your belly button. It has nil to do with your reproductive organs and will not effect fertility.

There isn't one.
The scar may become sore, but nothing else.
Your belly button is just where on earth your umbilical cord was when you were a fetus, it has nought to do with any bodily functions after that.