net/sched: Remove unused functions

Since commit c54e1d92 ("flow_offload: add ops to tc_action_ops for
flow action setup") these are unused.

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Link: https://patch.msgid.link/20250624014327.3686873-1-yuehaibing@huawei.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>