Always use target ES2021 (#25170)

build-scripts/bundle.cjs

@@ -74,11 +74,11 @@ module.exports.terserOptions = ({ latestBuild, isTestBuild }) => ({
 });
 
 /** @type {import('@rspack/core').SwcLoaderOptions} */
-module.exports.swcOptions = ({ latestBuild }) => ({
+module.exports.swcOptions = () => ({
   jsc: {
     loose: true,
     externalHelpers: true,
-    target: latestBuild ? "ES2021" : "ES5",
+    target: "ES2021",
     parser: {
       syntax: "typescript",
       decorators: true,

build-scripts/rspack.cjs

@@ -82,9 +82,7 @@ const createRspackConfig = ({
             },
             {
               loader: "builtin:swc-loader",
-              options: bundle.swcOptions({
-                latestBuild,
-              }),
+              options: bundle.swcOptions(),
             },
           ],
           resolve: {