drop es5 transformation for old browsers

Author: liborm85

webpack.config.js

@@ -27,7 +27,6 @@ module.exports = {
 		// Workaround https://github.com/webpack/webpack/issues/6642 until https://github.com/webpack/webpack/issues/6525 lands.
 		globalObject: `typeof self !== 'undefined' ? self : this`
 	},
-	target: ['web', 'es5'], // For Internet Explorer 11 support
 	resolve: {
 		alias: {
 			fs: path.join(__dirname, './src/browser-extensions/virtual-fs-cjs.js')