diff --git a/pkg/features/kube_features.go b/pkg/features/kube_features.go
index e238d8dfb47..34f55c6ef93 100644
--- a/pkg/features/kube_features.go
+++ b/pkg/features/kube_features.go
@@ -307,48 +307,12 @@ const (
 	// deletion ordering.
 	HonorPVReclaimPolicy featuregate.Feature = "HonorPVReclaimPolicy"
 
-	// owner: @leakingtapan
-	// alpha: v1.21
-	//
-	// Disables the AWS EBS in-tree driver.
-	InTreePluginAWSUnregister featuregate.Feature = "InTreePluginAWSUnregister"
-
-	// owner: @andyzhangx
-	// alpha: v1.21
-	//
-	// Disables the Azure Disk in-tree driver.
-	InTreePluginAzureDiskUnregister featuregate.Feature = "InTreePluginAzureDiskUnregister"
-
-	// owner: @andyzhangx
-	// alpha: v1.21
-	//
-	// Disables the Azure File in-tree driver.
-	InTreePluginAzureFileUnregister featuregate.Feature = "InTreePluginAzureFileUnregister"
-
-	// owner: @Jiawei0227
-	// alpha: v1.21
-	//
-	// Disables the GCE PD in-tree driver.
-	InTreePluginGCEUnregister featuregate.Feature = "InTreePluginGCEUnregister"
-
-	// owner: @adisky
-	// alpha: v1.21
-	//
-	// Disables the OpenStack Cinder in-tree driver.
-	InTreePluginOpenStackUnregister featuregate.Feature = "InTreePluginOpenStackUnregister"
-
 	// owner: @trierra
 	// alpha: v1.23
 	//
 	// Disables the Portworx in-tree driver.
 	InTreePluginPortworxUnregister featuregate.Feature = "InTreePluginPortworxUnregister"
 
-	// owner: @divyenpatel
-	// alpha: v1.21
-	//
-	// Disables the vSphere in-tree driver.
-	InTreePluginvSphereUnregister featuregate.Feature = "InTreePluginvSphereUnregister"
-
 	// owner: @mimowo
 	// kep: https://kep.k8s.io/3850
 	// alpha: v1.28
@@ -1092,20 +1056,8 @@ var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureS
 
 	ImageMaximumGCAge: {Default: true, PreRelease: featuregate.Beta},
 
-	InTreePluginAWSUnregister: {Default: false, PreRelease: featuregate.Alpha},
-
-	InTreePluginAzureDiskUnregister: {Default: false, PreRelease: featuregate.Alpha},
-
-	InTreePluginAzureFileUnregister: {Default: false, PreRelease: featuregate.Alpha},
-
-	InTreePluginGCEUnregister: {Default: false, PreRelease: featuregate.Alpha},
-
-	InTreePluginOpenStackUnregister: {Default: false, PreRelease: featuregate.Alpha},
-
 	InTreePluginPortworxUnregister: {Default: false, PreRelease: featuregate.Alpha},
 
-	InTreePluginvSphereUnregister: {Default: false, PreRelease: featuregate.Alpha},
-
 	JobBackoffLimitPerIndex: {Default: true, PreRelease: featuregate.Beta},
 
 	JobManagedBy: {Default: false, PreRelease: featuregate.Alpha},
diff --git a/pkg/volume/csimigration/plugin_manager.go b/pkg/volume/csimigration/plugin_manager.go
index 9bef59384ce..1ab7d8a9b17 100644
--- a/pkg/volume/csimigration/plugin_manager.go
+++ b/pkg/volume/csimigration/plugin_manager.go
@@ -61,17 +61,17 @@ func (pm PluginManager) IsMigrationCompleteForPlugin(pluginName string) bool {
 
 	switch pluginName {
 	case csilibplugins.AWSEBSInTreePluginName:
-		return pm.featureGate.Enabled(features.InTreePluginAWSUnregister)
+		return true
 	case csilibplugins.GCEPDInTreePluginName:
-		return pm.featureGate.Enabled(features.InTreePluginGCEUnregister)
+		return true
 	case csilibplugins.AzureFileInTreePluginName:
-		return pm.featureGate.Enabled(features.InTreePluginAzureFileUnregister)
+		return true
 	case csilibplugins.AzureDiskInTreePluginName:
-		return pm.featureGate.Enabled(features.InTreePluginAzureDiskUnregister)
+		return true
 	case csilibplugins.CinderInTreePluginName:
-		return pm.featureGate.Enabled(features.InTreePluginOpenStackUnregister)
+		return true
 	case csilibplugins.VSphereInTreePluginName:
-		return pm.featureGate.Enabled(features.InTreePluginvSphereUnregister)
+		return true
 	case csilibplugins.PortworxVolumePluginName:
 		return pm.featureGate.Enabled(features.InTreePluginPortworxUnregister)
 	default: