[PATCH] Remove duplicate or commented-out #includes

[Gary Benson]

Tom Tromey wrote:
> I wrote a little script to detect duplicate or commented-out
> #includes and ran it on gdb.  This patch is the result.  Tested
> by rebuilding.

Looks good to me :)  I did something similar a few years back,
though possibly only for system headers, or for just the ones
in common-defs.h.  So obviously I approve!

> It would be possible to sort #includes, or maybe run
> include-what-you-use on gdb, but I haven't tried that.  I'd be
> interested to hear if you think this would be worthwhile, thoug.

I'd consider it worthwhile.  I'd really like sorted #includes.
Some files have random whitespace in the list too, that maybe
made sense once.

Cheers,
Gary