Just my personal opinion but you shouldn't delete it! I think all scanlation should be archived here on MangaDex, no matter if it's MTL or human translated. ^^
FWIW, I appreciate the thought, and I don't want to imply what I've been doing on the site so far isn't worth anything - if I say "I use MTL", I don't mean I just run a script and call it a day. Hopefully it should be obvious, but I spend quite a lot of time on these - this chapter took me an hour or two most days over the course of two weeks or more, for example - and I genuinely think my grasp of and fluency with English is probably better than... a hell of a lot of fan translators.
At the same time, realistically I wouldn't be able to do
anything without a robot close to hand - I can read kana, just about, I know a few kanji and a bit of "anime Japanese", but that's mostly it. If some person or persons have put the effort in to actually
learn the language for real and wants to take a series until such time it gets officially licensed, they probably deserve it more than I do. And realistically, I'm probably attempting way too much for one person as it is. <_< Believe me, I've still got more to try.
If someone wanted to redo one of the series I've managed to get a few chapters of up, then I guess I might leave those around? We'll have to see, I guess. But with these single chapters where I can think "You...
probably should have assumed someone else was going to go for this", I'm not really interested in leaving my attempts around for data hoarders or archivists or what have you. I'd rather ditch it, chalk it up to "Eh, s'all practice, right?" and move on.