Remove key_manager.api_class hack
Remove key_manager.api_class hack

We can remove the hack associated with this TODO since devstack
is setting the config option value in change
I733279864ee1a4aaffc9c8eed81b5e12f8d8821b.

Depends-On: I733279864ee1a4aaffc9c8eed81b5e12f8d8821b

Closes-Bug: #1704875
Change-Id: I4461b8fa4e626afd8b94e942d4ad17726f307fbf

phenoxim/cinder,eharney/cinder,phenoxim/cinder,openstack/cinder,eharney/cinder,mahak/cinder,j-griffith/cinder,Datera/cinder,j-griffith/cinder,Datera/cinder,mahak/cinder,openstack/cinder