“ To adjudge that the old permit remained good until the expiration of the year is to adjudge an abstract question, as no relief can be now awarded concerning it. The refusal on the part of the insurance commissioner to grant authority to plaintiff to transact business after the old permit had expired does not raise a Federal question. Since the writ of error was filed the permit has ceased to have any effect, and, therefore, an event has occurred which renders it impossible for this court to grant any effectual relief in favor of plaintiff in error. ”