Stop exporting a sane PATH
Currently the script [exports a "sane" `PATH`](https://gitlab.archlinux.org/archlinux/mkinitcpio/mkinitcpio/-/blob/59f9d06e03c7cec1f097e2e1eeb574a65bce7c05/mkinitcpio#L36) which causes trouble if there are conflicting utilities under one of those sane path directories (especially `/usr/local/bin`).
The issue I had was that the build process was failing because I had Rust uutils in `/usr/local/bin`, but being a diligent user I had removed it from the `PATH` and it was still failing. I was baffled and did not find out the issue until I had manually removed `od` from `/usr/local/bin`.
I highly recommend removing this archaic bandaid, mkinitcpio isn't supposed to be a rescue tool which works in a broken environment. If for some reason you (the developers) do not like doing this, at the very least please remove `/usr/local/bin` from this "sane" list! It is highly unsafe (maybe even insane) to source coreutils from the local user's bin directory.
Thank you in advance!
issue