choropleth: when geojson is set, the geojson file from cdn.plot.ly is still loaded first

When using type: choropleth and setting a geojson url, the geojosn file from cdn.plot.ly still is loaded first.
I'd expect that only the specified geojson file is loaded and used.

(This would be useful to e.g. implement a strict CSP on a site using plotly)

Example: https://codepen.io/lucavazz/pen/jOdrWgV
(baed on https://codepen.io/lucavazz/pen/poGbybw / #4267)

var data = [{
   // ...
   geojson: 'https://unpkg.com/sane-topojson@4.0.0/dist/world_110m.json' 
   // this url is an example, in practice this would point to a relative assets path
}]

Is this intended behavior / is some configuration missing in the example to only use the provided geojson or is this a bug in the implementation?

Thanks in advance :)

使用提供的 geojson URL，通过 choropleth trace 复现所链接 CodePen 中的行为。跟踪 choropleth geojson 的加载路径，并验证发生了哪些请求；完成的标准是使用已配置的 geojson，而无需先加载 cdn.plot.ly 文件，同时保留示例的渲染行为。