LU-13005 lnet: remove the 'queue' from LNetEQ

LU-13005 lnet: remove the 'queue' from LNetEQ

All calls to LNetEQAlloc pass a size of 0, so no queue
is ever allocated.
So remove the 'size' arg, and all code that depends on
it being non-zero.
Similarly remove eq_size, eq_deq_seq eq_enq_seq and eq_events
as they are always 0/NULL.

Signed-off-by: Mr NeilBrown <neilb@suse.de>
Change-Id: Icb7bb352fa61cd6ea46847676e583e738eeeda8c
Reviewed-on: https://review.whamcloud.com/36844
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Chris Horn <chris.horn@hpe.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>