Discharge of guardian of minor or incompetent ward.

When a minor ward, for whom a guardian has been appointed under the provisions of this part or other laws of this state, attains his or her majority and, if such minor ward has been incompetent, is declared competent by the United States Department of Veterans Affairs and the court, or when an incompetent ward who is not a minor is declared competent by the United States Department of Veterans Affairs and the court, the guardian shall, upon making a satisfactory accounting, be discharged upon a petition filed for that purpose.