ciao-controller: Remove unused error constants from image service
ciao-controller: Remove unused error constants from image service

These error values defined by the image service have never been used.

Signed-off-by: Rob Bradford <c49e1dc14cd52e2644816db47123896e0ac79025@intel.com>

rbradford/ciao,tpepper/ciao,ciao-project/ciao,01org/ciao,kaccardi/ciao,tpepper/ciao,rbradford/ciao,01org/ciao,ciao-project/ciao,kaccardi/ciao,tpepper/ciao