VOL-1917 move to go mod

Change-Id: Ia8de8bd8a4f4d908cc1fa745f6f4ec949629017b
diff --git a/vendor/k8s.io/client-go/util/flowcontrol/backoff.go b/vendor/k8s.io/client-go/util/flowcontrol/backoff.go
index b7cb70e..39cd72f 100644
--- a/vendor/k8s.io/client-go/util/flowcontrol/backoff.go
+++ b/vendor/k8s.io/client-go/util/flowcontrol/backoff.go
@@ -99,7 +99,7 @@
 	if hasExpired(eventTime, entry.lastUpdate, p.maxDuration) {
 		return false
 	}
-	return p.Clock.Now().Sub(eventTime) < entry.backoff
+	return p.Clock.Since(eventTime) < entry.backoff
 }
 
 // Returns True if time since lastupdate is less than the current backoff window.