Fails to resolve imports on Python 3.11+

[nathan-williams]

When installing requirements with Python 3.11, pkg_resources==0.0.0 is unable to be resolved. That seemingly prevents us from resolving imports at runtime, e.g. import emoji, which are clearly available within the same library.

This problem was encountered when running some of the commands documented at https://github.com/googlefonts/emoji-scs, ex:

python sanity_check.py --noto_dir ../noto-emoji-next --emoji_metadata_dir ../emoji-metadata/

[anthrotype]

That line pkg_resources==0.0.0 should be removed from requirements.txt, not sure how it ended up there but I don't think it was done intentionally.

[anthrotype]

It seems like it's a bug in Ubuntu messing up package metadata that inadvertently shows up when doing pip freeze, see pypa/pip#4022

in any case you can safely delete it