Revert "expose React globals"

This reverts commit ccbb4f42f0.

webpack.config.ts

@@ -129,15 +129,6 @@ export default function (env?: Env): webpack.Configuration[] {
           assert: false,
         },
       },
-      externals: Object.assign(
-        { jquery: 'jQuery', bootstrap: 'bootstrap', 'admin-lte': 'adminlte' },
-        isDev
-          ? {}
-          : {
-              react: 'React',
-              'react-dom': 'ReactDOM',
-            },
-      ) as Record<string, string>,
       optimization: {
         // @ts-ignore
         minimizer: [new CssMinimizerPlugin({}), '...'],