Remove unused kill method from Service
Remove unused kill method from Service

In Service class we have a kill method that must have been inherited
from Nova code and that is not currently being used anywhere.

This patch removes this method instead of making it execute on SIGKILL
to preserve current behavior.

Change-Id: I50138d815ac93b171f246f4ecee9d1da1799e00d

cloudbase/cinder,j-griffith/cinder,j-griffith/cinder,phenoxim/cinder,phenoxim/cinder,mahak/cinder,NetApp/cinder,bswartz/cinder,eharney/cinder,NetApp/cinder,ge0rgi/cinder,Datera/cinder,openstack/cinder,eharney/cinder,openstack/cinder,Hybrid-Cloud/cinder,cloudbase/cinder,Datera/cinder,Nexenta/cinder,Hybrid-Cloud/cinder,mahak/cinder,bswartz/cinder,Nexenta/cinder