Matches https://github.com/ilyagr/pijul-clone as of now, might become out of sync

flake.nix: remove unnecessary build inputs

However, openssl is necessary for building, so it gets added to the devShell's build inputs.

Created by  cole-h  on November 16, 2020
VN6L65VRWLKTIXY7XD7OOZBMNKNSIEJG6PJUX5NKKYVYGVG4DFTAC
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