A minified version of the official aclanthology.bib without address, editor, month, and duplicate url+doi fields. Except for address, they are not rendered by ACL Natbib style anyway.
Get it here: https://raw.githubusercontent.com/zouharvi/anthology-bib-small/main/anthology.min.bib or:
curl https://raw.githubusercontent.com/zouharvi/anthology-bib-small/main/anthology.min.bib > anthology.min.bib
> ls -lh anthology.bib anthology.min.bib
58M anthology.bib
41M anthology.min.bib