I wouldn’t say not to train at all, depends what you’re used to. If you’re used to riding in the week you can change them to something cross specific. If you’re not used to riding a lot during the week then add in something gentle and build up.
I will generally ride 4 times in a week when I’m racing. Mon & Fri will be complete rest days, Tuesday will be a recovery ride on the road, Wednesday will be the only hard session of the week which I do on the turbo trainer, I might run on Wednesday too but only 5k max. Thursday will be my club’s evening MTB ride, usually 2hrs. Saturday will be a very gentle ride, usually with my lad (he’s 10) probably do an 60-90 mins.
Leading up to the season the Tuesday ride will probably be less recovery, and will swap with a skills session, dismount/mount, running with bike, shouldering, tight turns etc…
To be honest with all that, I should probably be performing better than I do! 🙁