As far as I can tell, there is no relation to static/config.js file. This file is used to overwrite instances after setup store. (mixed with api config)
When create store, it uses datas in src/modules/configs.js as initialization, it's included to bundled js file.
There's no need to be listed in static/config.js.
I think it might be because of local storage. please remove your browser history and try again.
persisted_state plugin keeps saving states from local storage if it's existing.