(Tho 'SOLVED', this post will knock Thread off of
ZRT visibility.)
There's NO way (to delete posts), by 'design', for 'transparency'.
Actually, the 'preferred' way is to: leave un-edited[-away] & post the solution
(for future searchers)
(obscure note: IF you want to
restore original/prior version, you[only OP] can click on tiny 'Edited by ... on ...' footnote, to see prior versionS!)
No harm, no foul.