Update pyston-2.3 (#2017)
Update pyston-2.3 (#2017)

The original 2.3 portable version was compiled on Ubuntu 20.04 and didn't work with older glibc.

This has been fixed and the older file has been deleted so hopefully this change is acceptable.
sebhahn/pyenv,pyenv/pyenv,pyenv/pyenv,sebhahn/pyenv,pyenv/pyenv,sebhahn/pyenv