diff --git a/pkg/kubelet/events/event.go b/pkg/kubelet/events/event.go
index 5af31fa219a..f0f3c1598c4 100644
--- a/pkg/kubelet/events/event.go
+++ b/pkg/kubelet/events/event.go
@@ -58,8 +58,6 @@ const (
 	WarnAlreadyMountedVolume             = "AlreadyMountedVolume"
 	SuccessfulAttachVolume               = "SuccessfulAttachVolume"
 	SuccessfulMountVolume                = "SuccessfulMountVolume"
-	InsufficientFreeCPU                  = "InsufficientFreeCPU"
-	InsufficientFreeMemory               = "InsufficientFreeMemory"
 	NodeRebooted                         = "Rebooted"
 	ContainerGCFailed                    = "ContainerGCFailed"
 	ImageGCFailed                        = "ImageGCFailed"