Delete entry in reported shadow state

Questions & Answers
#1

I’d like to know how to delete a key in the reported shadow state that was inserted using mgos_shadow_update(). I’ve tried mgos_shadow_update(0, “{some_key, null}”) but that just assigns the value of some_key to “null”.

#2 
curl -H 'Content-Type: application/json' \
  -d '{"shadow": {"state": {"desired": {"foo": null}}}}' \
  https://mdash.net/api/v2/m/device?access_token=PUBLIC_KEY
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