Is there any way to hide the configuration name of a top assembly in feature tree?

The assembly has one configuration and two display states.

Default is the name of main configuration. If only one configuration exists, why is it shown in front of top assembly in feature tree?

Thanks.

EDIT:

• Solidworks 2019 SP2
• If I delete one of Display States it disappears.
  As far as I remember I hadn't this problem in 2018. (Or am I wrong?)