[RFC PATCH] Remove bits/string.h.

[Wilco Dijkstra]

Zack Weinberg wrote:
> We just got rid of the machine-independent string inlines in the
> headers (bits/string2.h) thanks to Wilco; I propose we also eliminate
> the machine-dependent ones (bits/string.h).  These are not on by
> default, and even if they were a good idea at the time they were
> introduced, they haven't really been touched in ten to fifteen years
> and probably aren't a good idea on current-gen processors.

Agreed, this looks like a great cleanup, so my +1. For some reason
people only ever add code, but never remove it, so every now and again
you've got to get rid of all the cruft...

Wilco