LU-18753 socklnd: remove unused ksocknal_find_peer()

LU-18753 socklnd: remove unused ksocknal_find_peer()

Remove ksocknal_find_peer() since it is not called
anywhere.

Fixes: 0d816af574b7 ("LU-11300 lnet: remove lnd_query interface.")
Test-Parameters: trivial
Signed-off-by: Timothy Day <timday@amazon.com>
Change-Id: Ia9d15882260bf25ebf92d60239f666a6cc97d04a
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/58263
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Aurelien Degremont <adegremont@nvidia.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>