Not just the open-source project; 80%+ (depending a bit on when you start counting) of the MySQL team as a whole was let go, and the SVP in charge of MySQL was, eh, “moving to another part of the org to spend more time with his family”. There was never really a separate “MySQL Community Edition team” that you could fire, although of course there were teams that worked mostly or entirely on projects that were not open-sourced.