Use the default webpack configuration for dev env

We used to override the output filename but this was a misunderstanding of an error (due to webpacke(r) incompatibles versions)

https://medium.com/@web_developer/hash-vs-chunkhash-vs-contenthash-e94d38a32208

webpack/webpack.js.org#2096

Context: openfoodfoundation#10631 (review)

config/webpack/development.js

@@ -2,7 +2,4 @@ process.env.NODE_ENV = process.env.NODE_ENV || 'development'
 
 const environment = require('./environment')
 
-const config = environment.toWebpackConfig();
-config.output.filename = "js/[name]-[hash].js";
-
 module.exports = environment.toWebpackConfig()