As nonsense as this is, I can see how someone could get the idea that if a rim had a nice curvature forming the well area between the brake tracks they might think they could remove the offending bead/track material & simply glue a tubular to what remains.
It couldn't be a rim brake wheel anymore & it's probably guaranteed the circumference would be wrong to glue a tubular to.
Would make a nice wreath with some tinsel, a bit of ribbon, maybe a pine cone or two, though.