LU-11300 lnet: remove lnd_query interface.

The ->lnd_query interface is completely unused, and has been since
commit 8e498d3f23ea ("LU-11300 lnet: peer aliveness")

So remove all mention of it.

Fixes: 8e498d3f23ea ("LU-11300 lnet: peer aliveness")
Test-Parameters: trivial
Signed-off-by: Mr NeilBrown <neilb@suse.de>
Change-Id: Iff11652283b371519cf31bf66b9ba08e024d3193
Reviewed-on: https://review.whamcloud.com/37337
Reviewed-by: Chris Horn <hornc@cray.com>
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>