wifi: mac80211: mesh: Remove unused function declaration mesh_ids_set_default()

Commit ccf80ddf ("mac80211: mesh function and data structures
definitions") introducted this but never implemented it.

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20230731140712.1204-1-yuehaibing@huawei.com


Signed-off-by: Johannes Berg <johannes.berg@intel.com>