x86 build would fail because Zeranoe builds don't exist anymore

[HimbeersaftLP]

Context:

• https://twitter.com/Zeranoe/status/1300596971934224385
• https://github.com/jellyfin/jellyfin-server-windows/blob/0945956643a7d932b5f3d25a79dd9ceafeb5010c/build-jellyfin.ps1#L64

Possible solutions:

• Remove x86 building completely, as the docs mention it's deprecated anyways
• Add x86 Windows builds to https://github.com/jellyfin/jellyfin-ffmpeg/releases

Note that I haven't tried if they would fail for another reason, too.

[anthonylavado]

Ah thank you for bringing this up - I believe we package our own at this moment (though of course we should document that better).

Edit: I see you linked the 32-bit line. Yeah, we'll just take those options out.