LU-16965 obd: remove unused obd_evict_inprogress

LU-16965 obd: remove unused obd_evict_inprogress

Remove the atomic_t struct field obd_evict_inprogress
from 'struct obd_device'. This field was only ever
incremented in a unused function that was removed in
a previous patch. Hence, remove it altogther. This
patch also removes the associated wait queue.

Test-Parameters: trivial
Signed-off-by: Timothy Day <timday@amazon.com>
Change-Id: Id151c1e6a0adde8c1aeb6dbc903b9d98d00fd21d
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/51681
Reviewed-by: Patrick Farrell <pfarrell@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>