Fix reference to linux-only struct

pkg/kubelet/cm/cgroup_manager_unsupported.go

@@ -25,7 +25,7 @@ type unsupportedCgroupManager struct{}
 // Make sure that unsupportedCgroupManager implements the CgroupManager interface
 var _ CgroupManager = &unsupportedCgroupManager{}
 
-func NewCgroupManager(_ *cgroupSubsystems) CgroupManager {
+func NewCgroupManager(_ interface{}) CgroupManager {
 	return &unsupportedCgroupManager{}
 }