Upon the revocation of letters issued to a sole or last surviving personal representative or collector, the clerk of superior court shall appoint another personal representative or collector as provided by G.S. 28A-4-1 to act as successor to the sole or last surviving personal representative or collector. When two or more personal representatives or collectors have qualified, and the letters of one or more personal representatives or collectors are revoked, leaving in office one or more personal representatives or collectors, the appointment of successors shall not be required unless:
(1) The clerk of superior court determines, in the discretion of the clerk of superior court, that it is in the best interest of the estate to appoint a successor or successors to the personal representatives or collectors whose letters have been revoked, or
(2) In the case of executors, the will so provides.