Must I list my committee members as co-authors on a manuscript after being dismissed from grad school?
Unless they made scientific contributions, do not list them as co-authors. Proofreading and grammar help is cause for an acknowledgment, not co-authorship. If they contributed scientifically, then you have an ethical obligation to list them. If it is a borderline case, I would err on the side of not including them, given that they basically fired you.

You do need to list that institution as your affiliation. Even though you are no longer there, they funded you while you did this research (presumably) and deserve to have the attribution. Further, your contract may require this.

Edit: there was a (now-deleted) follow-up question about whether it's necessary to seek permission to acknowledge someone. My gut feeling is no, but check out: Is it necessary to ask permission before including someone in the acknowledgements of a research paper?