Use IClassIDSvc header from GaudiKernel
Delete the "forwarding-header" AthenaKernel/IClassIDSvc.h
and change all clients to use GaudiKernel/IClassIDSvc.h
.
Delete the "forwarding-header" AthenaKernel/IClassIDSvc.h
and change all clients to use GaudiKernel/IClassIDSvc.h
.