Considering Oracle's two recent actions against open source projects, I'd suspect this is yet another move to minimize the amount of open source software under its control.
More like remove... it seems like they are trying to shed away the open source parts of projects where they think they can still extract a profit. I don't think Oracle wants to shepherd any major open source projects and the investment that entails. They would rather move Solaris and Java back to the realm of closed-source and proprietary. Hopefully in the case of Java, still keeping it close to free as in beer.
They know that the open source community won't be able to seriously fork Java/OpenJDK. Even with newer JVM languages, Java's place has been cemented in enterprise environments. And if it is one thing Oracle knows, it is how to sell to the enterprise.
I'm not sure that I would do much differently if I were them either. Open source just doesn't seem to be in their DNA, and it's been quite successful for them. Even if it is to the detriment of others...