remove unnecessary file

webpack.config.js

@@ -1,15 +0,0 @@
-// Look in ./config folder for webpack.dev.js
-switch (process.env.NODE_ENV) {
-  case 'prod':
-  case 'production':
-    module.exports = require('./config/webpack.prod')({env: 'production'});
-    break;
-  case 'test':
-  case 'testing':
-    module.exports = require('./config/webpack.test')({env: 'test'});
-    break;
-  case 'dev':
-  case 'development':
-  default:
-    module.exports = require('./config/webpack.dev')({env: 'development'});
-}