doc: Remove i386 from landing page

[maflcko]

It is no longer possible to install any nightly llvm build for i386 on any Ubuntu at all. (I tested i386-bionic just now)

Thus, remove it from the docs.

[sylvestre]

it is still supported for Debian, so, it makes sense to keep it,no?

[maflcko]

I tried testing it locally, but it didn't seem to be working. Maybe it is related to #15?

root@0b54a459d7e0:/# apt update
Hit:2 http://deb.debian.org/debian buster InRelease
Hit:3 http://deb.debian.org/debian-security buster/updates InRelease
Hit:4 http://deb.debian.org/debian buster-updates InRelease
Hit:1 https://apt.llvm.org/buster llvm-toolchain-buster-16 InRelease
Reading package lists... Done
Building dependency tree       
Reading state information... Done
All packages are up to date.
root@0b54a459d7e0:/# apt install clang-16 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package clang-16
root@0b54a459d7e0:/# dpkg --print-architecture
i386

[sylvestre]

how are the repos configured?
thanks

[maflcko]

All I did was:

podman run -it --rm "docker.io/i386/debian:10"

And then:

apt update && apt install lsb-release wget software-properties-common gnupg -y && wget https://apt.llvm.org/llvm.sh && chmod +x llvm.sh && ./llvm.sh 16

[sylvestre]

yeah, i regressed that, i am working on fixing this