Let me delete the world you're hiding from me

Every time I open my worlds menu I get a pop-up that basically says, "Hey! We're hiding this content from you because you got it on a trial and no longer own it."

And because it's not in the worlds menu—because you're hiding it from me, thanks I know!—I can't delete this world which I no longer want.

I don't want this world anymore. Why can't I delete it and why are you constantly reminding me that you're hiding it? Just let me !@#$ delete it mother of %^&*