Return value of unregister_qdisc is unused, remove it.
Signed-off-by: NZhengchao Shao <shaozhengchao@huawei.com>
Link: https://lore.kernel.org/r/20220815030417.271894-1-shaozhengchao@huawei.comSigned-off-by: NJakub Kicinski <kuba@kernel.org>