ciao-controller: Remove unused volume code
ciao-controller: Remove unused volume code

Remove some unused code that is found by an aggressive linter following
the merge of #1594.

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

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