Unless the guardian of a minor’s estate dies, is removed, or resigns the guardianship, the guardian shall continue in office until the minor attains the age of majority or, in the case of testamentary guardianship, until the termination of the period set forth in the testator’s will. At the expiration of the guardianship, the guardian shall deliver and pay all the estate and money in his possession, or with which he is chargeable, to the person entitled to receive such estate and money.