Okla. Stat. tit. 62, § 291

That any municipality, political corporation or subdivision of this state, which has issued its bonds for any purpose and after the issuance or approval of said bonds it is determined that the purpose for which said bonds were issued has ceased to exist, is hereby authorized to cancel and destroy said bonds, thereby absolving itself from any liability for the payment of said bonds, or the coupons thereto attached, in the manner and under the procedure provided in Section Two hereof. Laws 1919, c. 222, p. 318, § 1.