Remove old configuration adding hashes for files (#3169)

* Remove old configuration adding hashes for files

Per all dependency updates, we don't need hashes on filenames when hot
reloading. Plus, this could be configured in base.js where other output
options are set.

* remove test change

Author: justin808

package/environments/development.js

@@ -12,12 +12,6 @@ let devConfig = {
 }
 
 if (runningWebpackDevServer) {
-  if (devServer.hmr) {
-    devConfig = merge(devConfig, {
-      output: { filename: '[name]-[hash].js' }
-    })
-  }
-
   const devServerConfig = {
     devMiddleware: {
       publicPath