How can I take off Darth Vader Card in Bossk Cards

When the upgrade went through with Obi-Wan Kenobi being added, I never really used Bossk but when I did for the first time I noticed the Darth Vader's Bonus Health (max) purple was listed on Bossk's Cards.  Because of this, I can only load 2 cards for Bossk.  The bonus health doesn't even work for Bossk.  Is there any way to correct this?