Remove references to old template (#46082)

Summary:
## Summary
There are old references to the react-native/template. This code has
moved to react-native-community/template.

Changelog: [Internal]

Pull Request resolved: https://github.com/facebook/react-native/pull/46082

Test Plan:
CI

closes facebook/metro#1324

Reviewed By: cipolleschi

Differential Revision: D61472439

Pulled By: blakef

fbshipit-source-id: fc40145c03002a7c3117b72d07981a96aa3d8760