Revert "fix iteritems for python 3"

This reverts commit 0bb04e132a.

This was supposed to land on stable-2.2, not stable-2.1

lib/ansible/module_utils/cloudstack.py

@@ -28,7 +28,6 @@
 # USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 import time
-from ansible.module_utils.six import iteritems
 
 try:
     from cs import CloudStack, CloudStackException, read_config