Click on the x in the top right-hand corner of that officer's tab.  That's typical of how PTO works.

I am having trouble deleting an officer on Form 990 input.  There is no X on the tab by their name and when you go to the list view their name is greyed out and under details there is no way to change the name.  I saw one other person asked this about 3 weeks ago.  Am I missing something or is their something wrong?

Did you get this resolved?  I am having the same problem and don't see the X on the tab like I usually would to delete.  

Below are screenshots of where the "x" is and what would appear after you click on the "x":