A questioner has sufficiently clarified his question that my comments are no longer valid. Normally, I'd just delete them, but they've been moved to chat, and I don't see a way to remove them.
Chat messages can't be removed after the edit period of 2 minutes. They will stay in the chat the way they are. Mods can theoretically change them, but there is no reason why they would need to do that for comments that served their purpose and were moved to chat.