ESM: Fixed OperationError detection and tidied up ops.

webpack.config.js

@@ -1,6 +1,5 @@
 const webpack = require("webpack");
 const ExtractTextPlugin = require("extract-text-webpack-plugin");
-const WebpackSyncShellPlugin = require("webpack-synchronizable-shell-plugin");
 
 /**
  * Webpack configuration details for use with Grunt.
@@ -43,19 +42,7 @@ module.exports = {
             raw: true,
             entryOnly: true
         }),
-        new ExtractTextPlugin("styles.css"),
-        new WebpackSyncShellPlugin({
-            onBuildStart: {
-                scripts: [
-                    "echo \n--- Generating config files. ---",
-                    "node --experimental-modules src/core/config/scripts/generateOpsIndex.mjs",
-                    "node --experimental-modules src/core/config/scripts/generateConfig.mjs",
-                    "echo --- Config scripts finished. ---\n"
-                ],
-                blocking: true,
-                parallel: false
-            }
-        })
+        new ExtractTextPlugin("styles.css")
     ],
     resolve: {
         alias: {