net/sched: cls_api: remove 'unicast' argument from delete notification

This argument is never called while set to true, so remove it as there's
no need for it.

Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20231208192847.714940-7-pctammela@mojatatu.com


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