[ops] [cinder] __DEFAULT__ volume type

I have recently updated my Cloud from Rocky to Train (I am running Cinder v. 15.4.0) I have a question concerning the __DEFAULT__ volume type, that I don't remember to have seen before.

Since: - I have no volumes using this volume type - I defined in in the [DEFAULT] section of cinder.conf the attribute "default_volume_type" to a value different than "__DEFAULT___"

I assume that I can safely delete the __DEFAULT__ volume type

Is this correct?

Thanks, Massimo