Partnership Out of Business - Unlock Suspended Passive loss

I am a limited partner in a partnership. The partnership had been in bankruptcy proceedings for several years and there was litigation regarding management fees and it seems to have ceased functioning. There isn't any response from attempts to communicate with the receiver and there doesn't appear to be a K-1 coming. I have years of suspended passive losses (about $21,000) shown on my form 8582.
I would like to report the activity as "final year" and unlock the suspended loss.
Is there any kind of disclosure I need to add to the return since an official Schedule K-1 wasn't received?

There wasn't an official "disposition" or sale, instead the partnership just ceased to function.