Merge pull request #41799 from johscheuer/fix-quobyte-example

Automatic merge from submit-queue

Remove unnecessary constants and add type to secret

**What this PR does / why we need it**:
Adds the type field to the secret for the `persistent-volume-provisioning` example of Quobyte. Also remove unnecessary constants in Quobyte Code base.

FYI
@rootfs @saad-ali @quolix

pkg/volume/quobyte/quobyte.go

@@ -61,10 +61,6 @@ var _ volume.Deleter = &quobyteVolumeDeleter{}
 
 const (
 	quobytePluginName = "kubernetes.io/quobyte"
-
-	annotationQuobyteAPIServer          = "quobyte.kubernetes.io/api"
-	annotationQuobyteAPISecret          = "quobyte.kubernetes.io/apiuser"
-	annotationQuobyteAPISecretNamespace = "quobyte.kubernetes.io/apipassword"
 )
 
 func (plugin *quobytePlugin) Init(host volume.VolumeHost) error {