chuwi-hi10plus: drop (MR 2989)

I'd say this is not appropriate to be in postmarketOS because
this is just a bog standard x86 computer, it has UEFI BIOS and
everything, and you can just boot a Linux distro on a USB
stick.

It also has a 64-bit UEFI unlike some other tablet, so there
should be no issue installing a Linux distro with a fairly
modern kernel these days.

So, let's just drop it and forget this port even existed.