Solanum nigrum or one of its variants. Just pull it.

btw luckily this one was easy. But, for future reference, for anything less common, a much closer picture would be needed of just the one plant. There are at least six different species mixed up the photo.

I agree... Nightshade. And, the berries are poisonous.

Thank you both so much!! I will yank it out. It's very interesting, I haven't seen it around.