diff --git a/pkg/kubelet/events/event.go b/pkg/kubelet/events/event.go
index b948edbda18..182c383d8e7 100644
--- a/pkg/kubelet/events/event.go
+++ b/pkg/kubelet/events/event.go
@@ -49,13 +49,11 @@ const (
 	StartingKubelet                      = "Starting"
 	KubeletSetupFailed                   = "KubeletSetupFailed"
 	FailedAttachVolume                   = "FailedAttachVolume"
-	FailedDetachVolume                   = "FailedDetachVolume"
 	FailedMountVolume                    = "FailedMount"
 	VolumeResizeFailed                   = "VolumeResizeFailed"
 	VolumeResizeSuccess                  = "VolumeResizeSuccessful"
 	FileSystemResizeFailed               = "FileSystemResizeFailed"
 	FileSystemResizeSuccess              = "FileSystemResizeSuccessful"
-	FailedUnMountVolume                  = "FailedUnMount"
 	FailedMapVolume                      = "FailedMapVolume"
 	FailedUnmapDevice                    = "FailedUnmapDevice"
 	WarnAlreadyMountedVolume             = "AlreadyMountedVolume"