Yeah, wasn't sure about this. There is [this](https://github.com/walmartlabs/phoenix-shared/blob/master/js/session-cache.js), but it is not available of the loader.

Now that you mention it, I just looked through the code, and I couldn't find where we were setting `dpr` anywhere, nor any other place where we are looking up the value. we may be able to remove this part completely.