[PATCH] remove arm/unknown-elf.h

[Neil Booth]

Richard Earnshaw wrote:-

> It seems to me that the abstractions in GCC for target CPU and OS are 
> horribly intermixed, and that it would be useful to try and tease these 
> apart somehow.

Yes please!

The spaghetti of headers stopped me from getting more target hooks
done; it was getting increasingly difficult to work out what was
defined to what in many cases.

Neil.