diff --git a/internal/csi-common/controllerserver-default.go b/internal/csi-common/controllerserver-default.go
index 96b005989..3daa31ca7 100644
--- a/internal/csi-common/controllerserver-default.go
+++ b/internal/csi-common/controllerserver-default.go
@@ -45,13 +45,6 @@ func (cs *DefaultControllerServer) ControllerUnpublishVolume(
 	return nil, status.Error(codes.Unimplemented, "")
 }
 
-// ControllerExpandVolume expand volume.
-func (cs *DefaultControllerServer) ControllerExpandVolume(
-	ctx context.Context,
-	req *csi.ControllerExpandVolumeRequest) (*csi.ControllerExpandVolumeResponse, error) {
-	return nil, status.Error(codes.Unimplemented, "")
-}
-
 // ListVolumes lists volumes.
 func (cs *DefaultControllerServer) ListVolumes(
 	ctx context.Context,
@@ -81,20 +74,6 @@ func (cs *DefaultControllerServer) ControllerGetCapabilities(
 	}, nil
 }
 
-// CreateSnapshot creates snapshot.
-func (cs *DefaultControllerServer) CreateSnapshot(
-	ctx context.Context,
-	req *csi.CreateSnapshotRequest) (*csi.CreateSnapshotResponse, error) {
-	return nil, status.Error(codes.Unimplemented, "")
-}
-
-// DeleteSnapshot deletes snapshot.
-func (cs *DefaultControllerServer) DeleteSnapshot(
-	ctx context.Context,
-	req *csi.DeleteSnapshotRequest) (*csi.DeleteSnapshotResponse, error) {
-	return nil, status.Error(codes.Unimplemented, "")
-}
-
 // ListSnapshots lists snapshots.
 func (cs *DefaultControllerServer) ListSnapshots(
 	ctx context.Context,