[react-www] remove forked bundle (#25866)

*NOTE:* re-apply of 645ae2686b now that
www is updated.

The `enableNewReconciler` was gone with
420f0b7fa1, this removes the bundle
config.

scripts/rollup/bundles.js

@@ -163,17 +163,6 @@ const bundles = [
     externals: ['react'],
   },
 
-  /******* React DOM - www - Uses forked reconciler *******/
-  {
-    moduleType: RENDERER,
-    bundleTypes: [FB_WWW_DEV, FB_WWW_PROD, FB_WWW_PROFILING],
-    entry: 'react-dom',
-    global: 'ReactDOMForked',
-    minifyWithProdErrorCodes: true,
-    wrapWithModuleBoundaries: true,
-    externals: ['react'],
-  },
-
   /******* Test Utils *******/
   {
     moduleType: RENDERER_UTILS,