Delete custom fields

curl --request POST \
  --url https://platform.thena.ai/v1/custom-field/delete \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '{
  "fields": [
    {
      "fieldId": "<string>",
      "version": 123
    }
  ]
}'