const internal/types/errors.UnusedLabel

3 uses

	internal/types/errors (current package)
		code_string.go#L130: 	_ = x[UnusedLabel-122]
		codes.go#L1175: 	UnusedLabel

	go/types
		labels.go#L44: 			check.softErrorf(lbl, UnusedLabel, "label %s declared and not used", lbl.name)