On the one hand, if we WONTFIX all the bugs and remove the component, we've got a clean break. It makes it clear that we are not officially supporting the app now.
On the other hand, if we leave the bugs open, it would make it easier for a community maintainer to pick up where we left off and take over maintenance. But, it would suck to have people still reporting issues with the expectation that they'll be fixed, when there's no chance we'll look at them.
I think we should WONTFIX the bugs and prevent the filing of new bugs against the Commons app somehow, so that people can't file new ones with the expectation of fixes. But all the WONTFIXed bugs should remain in Bugzilla so a community maintainer can access them if he desires.
Unless there are any objections or better ideas, I'll ask Andre to implement something to this effect on Monday.
Dan