These files are the contents of:
https://github.com/google/closure-library/tree/72ca4df39f6130d20b98c20f6e77c50a74e3d9e2/closure/bin/build

As of 21 June 2021, these files were deleted from Google's Closure Library repo.

The deprecation warning in closurebuilder.py has been commented out.
Output modes 'script' and 'compiled' have been removed.
