Earlier quoted context omitted.
In response to the dev on HN 2 days ago, Adria said[1]: "I'm sorry to hear your employer deciding to not to work with you on this and I hope they reconsider, bring you back on and dealing with it constructively" [1] https://news.ycombinator.com/item?id=5399047
"I'm sorry to hear" is the standard non-apology apology. It's like "I'm sorry you got offended."
She didn't fire the guy. The most she could say is that she doesn't think he should have been fired over this, and I read that part of the quote (repeated above) as reflection of my point.