Has anyone kicked out a Bridesmaid?

I would wait to see if their divorce gets finalized...just to be sure. If you can't wait though, then just be honest. I'm unsure of the details behind the divorce, so It's hard to suggest wording (because I don't know if y'all's relationship is tarnished or not), but you can say something like "I am sorry to have to do this, I know it's awkward, but with the upcoming divorce I think it'd be best if you stepped down from being a bridesmaid."

I'd just wait. I only assume she knows she won't be a bridesmaid any longer, but it's probably the last thing on her mind right now.

Your wedding isn't for another year. I would just wait for now.

Honestly this is hard I would sit down with both of them and be honest with them. "I still want _____ to be my bridesmaid, I just need to be %100 sure what is going on between you both won't upset my wedding day." Give them a chance to be civil and watch them. If she does/says something against him she's out, if he say/does something he should have consequences as well. To me it's whoever is more mature and civil about this that should have the privilege of being in or at your wedding. That's just my take on it.

Yes, please wait until the dust settles! Then talk to her and see if, given the situation, she would still like to be a BM

I think the big question should be - do you still want her to be your bridesmaid? without knowing you, or your relationship with you and your brother, its difficult to answer, but I can imagine things are not ending well between the two of them if they are getting divorced. Do you actually want her there for your wedding?

Thanks to everyone here for helping me think on it and continue to think on it.
Things are getting worse between them but she still talks to me about every body, nothing important or what's going on, but still communicates for the time being.
I'm worried that they both chang their mind and than I'll have kicked her out for nothing, or something along those lines!
My brother and I are fairly close, so I know what's going on, and when mentioned to him about it, he said that's up to you, well I'll wait and see how bad it does get & everything & go from there! Thanks everyone for the help and advice!

I would definitely still wait but if she's the one being removed from the family essentially you might feel it isn't necessary for her to be in your wedding anymore. Wait to see if everything gets finalized. That's rough!