remove arch/sh

[Christoph Hellwig]

On Fri, Jan 13, 2023 at 09:26:23AM +0100, Geert Uytterhoeven wrote:
> Indeed.  The main issue is not the lack of people sending patches and
> fixes, but those patches never being applied by the maintainers.
> Perhaps someone is willing to stand up to take over maintainership?

The other problem is that it hasn't a DT conversion, and there are
lot of crufty platforms, and crufty hooks in various drivers and
core code.

It's been mentioned a few times that it might be time to go to a minimal
DT only port and then regrow what people are actually using, but for
that we need indiciations of what people are actually using.

And yes, it does need a proper maintainer, and some actual maintainer
option like cutting down unused machine support.