old_contents: /* eslint-disable */
  var webpack = require('webpack');
  var devConfig = require('./webpack.config');
  
  var UglifyJsPlugin = webpack.optimize.UglifyJsPlugin;
  
  devConfig.plugins.push(
    new webpack.DefinePlugin({
      "process.env": {
        NODE_ENV: JSON.stringify("production")
      }
    }),
    new UglifyJsPlugin({ minimize: true })
  );
  
  devConfig.devtool = 'source-map';
  
  module.exports = devConfig;
  
new_contents: /* eslint-disable */
  var webpack = require('webpack');
  var devConfig = require('./webpack.config');
  
  var UglifyJsPlugin = webpack.optimize.UglifyJsPlugin;
  
  devConfig.plugins.push(
    new webpack.DefinePlugin({
      "process.env": {
        NODE_ENV: JSON.stringify("production")
      }
    }),
    new UglifyJsPlugin({ minimize: true })
  );
  
  module.exports = devConfig;
  
subject: remove source-map for prod