dillon1000/react

Delete Entries without Build Output from package.json and the build directory (#19029)

* Gate test

* Delete entrypoints without Build Outputs from package.json and build output

If an entry point exists in bundles.js but doesn't have any bundleTypes,
I delete that entry point file from the build directory. I also remove it
from the files field in package.json if it exists.

This allows us to remove bundles from being built in the stable release
channel.