If you've added someone who was not supposed to have a step on your routing, the fix is easy. Note that this is a two step process if you want to completely remove someone's access to a routing.

Step 1: hover over their name and click on the 'edit' button. Click on the red trash can to the left of the person's name to remove them from your routing steps.

Step 2: Even though the 'Director' has been removed from the routing steps, they can still view the routing as a participant. To remove them completely from the routing, hover over their name in the participant column, and click on the red trash can. You will receive a prompt to confirm you are removing this person.

Problem solved! Make sure you follow both steps to fully remove a person that should not have access to a routing.