Removed NODE_ENV from DefinePlugin

Author: high1

webpack.config.js

@@ -59,7 +59,6 @@ module.exports = (_, { mode = 'none' }) => ({
     }),
     new DefinePlugin({
       __MODE__: JSON.stringify(mode),
-      'process.env.NODE_ENV': JSON.stringify(mode),
     }),
     ...(mode === 'development'
       ? [new ForkTsCheckerWebpackPlugin(), new HotModuleReplacementPlugin()]