Since chain lube only works on the inside of the chain, any nlube on the outside is excess. You want to wipe off as much as you reasonably can, though with most oils it'll be hard to wipe it totally dry. How much to leave on is up to you. If you ride in wet or harsh conditions, you might leave a film as rust protection, but if you ride in sandy or dusty conditions you might use some solvent of your wiping rag to get it dry to the touch so less will stick.
Don't overthing it, it's a bike chain, if it attracts a ton of dirt, wipe it drier, if it rusts, wipe some oil back onto it.
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