net: switchdev: Remove unused typedef switchdev_obj_dump_cb_t()

Commit 29ab586c ("net: switchdev: Remove bridge bypass support from switchdev")
leave this unused.

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20230801144209.27512-1-yuehaibing@huawei.com


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