.brew.sh: Remove pointless symlink
.brew.sh: Remove pointless symlink

The following is unnecessary:

    ln -s /usr/local/bin/gsha256sum /usr/local/bin/sha256sum

…because the non-prefixed version is already in `$(brew --prefix coreutils)/libexec/gnubin`.

https://github.com/Homebrew/brew/issues/1171#issuecomment-250906442

Closes #709.

ifdattic/dotfiles