[ci] Update metro config as per upstream

Author: alloy

metro.config.js

@@ -46,20 +46,14 @@ if (
   });
 } else {
   module.exports = {
-    serializer: {
-      getModulesRunBeforeMainModule: () => [
-        require.resolve('./Libraries/Core/InitializeCore'),
-      ],
-      getPolyfills,
-    },
     resolver: {
       platforms: ['ios', 'macos', 'android'],
       extraNodeModules: {
         'react-native': __dirname,
       },
     },
-    transformer: {
-      assetRegistryPath: require.resolve('./Libraries/Image/AssetRegistry'),
+    serializer: {
+      getPolyfills,
     },
   };
 }