SolidFire driver introduced a clone image feature in Kilo release[1]
where we would create a cache volume with volume ID same as of image
ID to create volume from image efficiently by cloning from that cached
volume.
This feature worked same as the image cache feature we have in cinder
so it was deprecated in queens[2] and removed in train[3] in favor of
image cache feature provided by cinder.
However, we still kept compatibility code if users had solidfire cached
volumes to still take advantage of those to create efficient volume
from images.
In the current master (Yoga), we can safely assume that people have
moved to using the image cache feature of cinder since the solidfire
options to enable efficient cloning doesn't exist since train release.
This patch removes the remaining code around this feature as it
doesn't provide any additional benefit and we also log an ERROR
message unnecessarily confusing the operators for every create volume
from image request (details are in the linked launchpad bug).
Closes-Bug: #1959178
[1] https://review.opendev.org/c/openstack/cinder/+/142859
[2] https://review.opendev.org/c/openstack/cinder/+/511623
[3] https://review.opendev.org/c/openstack/cinder/+/664739
Change-Id: I8fe00b06ebb439f83f8cad0f592064c540c54b77
(cherry picked from commit 6b97abc4e4)
(cherry picked from commit 9b583401ad)
(cherry picked from commit c58f74029a)
70164132dc