Remove support for csrgen
This was never feature complete and currently has issues and
we lack the resources to maintain it.
Drop it for now. It can be revived from git history in the
future if we see the need.
https://pagure.io/freeipa/issue/8669
Signed-off-by: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>