stop transpiling for firefox 68

We no longer care about compatibility with so old browsers

index.js

-import 'core-js/actual'; // BBB firefox 68
 import "./public-path.js"
 import * as monaco from 'monaco-editor';
 import init, { Workspace } from "./ruff/crates/ruff_wasm/src/pkg";

package.json

@@ -8,11 +8,7 @@
     "deploy": "NODE_ENV=production node deploy.js"
   },
   "devDependencies": {
-    "@babel/core": "^7.20.5",
-    "@babel/preset-env": "^7.20.2",
     "argparse": "^1.0.10",
-    "babel-loader": "^9.1.0",
-    "core-js": "^3.26.1",
     "css-loader": "^5.2.4",
     "file-loader": "^6.2.0",
     "monaco-editor": "latest",

webpack.config.js

@@ -30,27 +30,6 @@ module.exports = {
         test: /\.ttf$/,
         use: ["file-loader"],
       },
-      {
-        test: /\.m?js$/,
-        exclude: {
-          and: [/node_modules/],
-          not: [/monaco-editor/],
-        },
-        use: {
-          loader: "babel-loader",
-          options: {
-            presets: [
-              [
-                "@babel/preset-env",
-                {
-                  targets: { firefox: 68 },
-                  corejs: "3",
-                },
-              ],
-            ],
-          },
-        },
-      },
     ],
   },
   optimization: productionMode