These headlines are so misleading. The court is not saying you can advertise traditional wings as boneless, or that it can be a piece of meat with intentional bones in it. They're saying that the term "boneless" refers to the style of wing (i.e. not a wing at all, but chopped up breast meat), a term that differentiates them from traditional bone-in wings. And the term is not a legally binding guarantee that no accidental bones are found in the wings.
That may still sound ridiculous, until you realize that it is not uncommon at all for a small piece of rib bone to remain attached to chicken breasts when butchered. I find them from time to time when I buy chicken breasts at the grocery store. If that bone isn't caught and removed either in the processing of the whole chicken or in the final processing of the chicken breasts into boneless wings, that piece of bone CAN end up in the boneless wings your are served. In fact, from what i read, that sounds like exactly what happened in this case. What the court said is basically that restaurants are not liable for the presence of these little rib bones based solely on the fact that they use the correct and common term for the style of wings that happens to be "boneless".