Remove outdated artifacts codegen early return (#53690)

Summary:
Follow-up to https://github.com/facebook/react-native/issues/53503 for a regression

When no React Native module is present this bail condition stops us from generating the artifacts podspec that's needed to complete build.

## Changelog:

[IOS] [FIXED] - Fix regression that skips artifacts code generation

Pull Request resolved: https://github.com/facebook/react-native/pull/53690

Test Plan:
- Create an app **without** any React Native modules, run `pod install`; without this fix the podspec will be missing and the build will fail
  - With expo this can be reproduced using `create-expo-app --template blank-typescript@next` on `react-native@0.81.2`
  - With the community CLI this can be reproduced using `npx react-native-community/cli@latest init test --skip-install --version 0.81.2` and uninstalling `react-native-safe-area-context`

Reviewed By: javache

Differential Revision: D82103491

Pulled By: cipolleschi

fbshipit-source-id: 3d9619b5a935ca920220824b3963a9a107f926ca