pkg/actuators/machine/actuator: Drop setMachineCloudProviderSpecifics…

… comment

The updateProviderID comment was probably a copy/paste error when
setMachineCloudProviderSpecifics landed in 716083f (Set additional
machine annotations/labels to get pretty machine output, 2019-07-23,
openshift#242).  I haven't read through the
function carefully enough to be able to propose a comment that adds
much beyond the function name, which is fairly clear on its own.  But
I know the updateProviderID comment is not a good fit ;).

pkg/actuators/machine/actuator.go

@@ -130,7 +130,6 @@ func (a *Actuator) Create(context context.Context, cluster *clusterv1.Cluster, m
 	return a.updateStatus(updatedMachine, instance)
 }
 
-// updateProviderID adds providerID in the machine spec
 func (a *Actuator) setMachineCloudProviderSpecifics(machine *machinev1.Machine, instance *ec2.Instance) (*machinev1.Machine, error) {
 	if instance == nil {
 		return machine, nil