All sales of tax-title lands heretofore consummated by any county, to a city or town, for municipal purposes, or public use, shall be absolute and final, and transfer title in fee, notwithstanding any reversionary provision in the tax deed to the contrary; and all tax-title deeds containing any such reversionary provision shall upon application of grantee in interest, be revised to conform with the provisions herein.
RCW 36.35.280