How can I unassign an Organization goal?

Summary

I created an Organization goal, but there is 1 manager that should not have it. Can I unassign it?

Content

Hi there,

I created an Organization goal (Horseback Riding) as a top level manager.  But there is 1 manager (Lisa Martin) that should not have the goal (Horseback Riding) .  I tried to use the Assign.  And I unchecked the box under Assign To for that manager Lisa Martin and Saved.  But when I login as that manager Lisa Martin, the Organization goal (Horseback Riding) is there for her.  And when I log back in as the top level manager that created the Organization goal