Throttle disk write to prevent etcd puking during upgrade

clitools/pkg/node/kubeadm_upgrade.go

@@ -96,9 +96,6 @@ func resolvePauseImage(ctx context.Context, nctx *NodeContext, kubeVersion strin
 			continue
 		}
 
-		// examples:
-		// registry.k8s.io/pause:3.10
-		// some.registry.local/pause:3.10
 		if strings.Contains(line, "/pause:") || strings.HasPrefix(line, "pause:") {
 			return line, nil
 		}