remove arch/sh

[Christoph Hellwig]

On Fri, Feb 03, 2023 at 09:24:46AM +0100, John Paul Adrian Glaubitz wrote:
> Since this is my very first time stepping up as a kernel maintainer, I was hoping
> to get some pointers on what to do to make this happen.
> 
> So far, we have set up a new kernel tree and I have set up a local development and
> test environment for SH kernels using my SH7785LCR board as the target platform.
> 
> Do I just need to send a patch asking to change the corresponding entry in the
> MAINTAINERS file?

I'm not sure a there is a document, but:

 - add the MAINTAINERS change to your tree
 - ask Stephen to get your tree included in linux-next

then eventually send a pull request to Linus with all of that.  Make
sure it's been in linux-next for a while.