To remove assignee or reviewer, click on the specific program under “Your programs” on the Dashboard or go to “Control Management” in the left menu. Click on the title of the control of which you wish to remove an assignee or reviewer. In the top you can search for the program name in which the specific control is.
To remove assignee or reviewer, go to the “Assign” section and click on the cross in the right side of the user you want to remove from the control. It is important to notice that a control will be inactive if there is no user assigned to it, whereas reviewer is an optional choice.