[Beta] Remove some polyfills (#5158)

beta/next.config.js

@@ -45,8 +45,16 @@ const nextConfig = {
     // Don't bundle the shim unnecessarily.
     config.resolve.alias['use-sync-external-store/shim'] = 'react';
 
-    const {IgnorePlugin} = require('webpack');
+    const {IgnorePlugin, NormalModuleReplacementPlugin} = require('webpack');
     config.plugins.push(
+      new NormalModuleReplacementPlugin(
+        /^raf$/,
+        require.resolve('./src/utils/rafShim.js')
+      ),
+      new NormalModuleReplacementPlugin(
+        /^process$/,
+        require.resolve('./src/utils/processShim.js')
+      ),
       new IgnorePlugin({
         checkResource(resource, context) {
           if (

beta/src/utils/processShim.js

@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ */
+
+// Used in next.config.js to remove the process transitive dependency.
+module.exports = {
+  env: {},
+  cwd() {},
+};

beta/src/utils/rafShim.js

@@ -0,0 +1,6 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ */
+
+// Used in next.config.js to remove the raf transitive dependency.
+export default window.requestAnimationFrame;