MAINTAINERS: remove Richard Purdie as backlight maintainer

Remove Richard Purdie as backlight subsystem maintainer,

akpm: Richard is still responsive and is reviewing some of the patches,
but appears to agree that listing him as the maintainer is no longer
appropriate.

[akpm@linux-foundation.org: s/USA/UK/]
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

CREDITS

@@ -2895,6 +2895,11 @@ S: Framewood Road
 S: Wexham SL3 6PJ
 S: United Kingdom
 
+N: Richard Purdie
+E: rpurdie@rpsys.net
+D: Backlight subsystem maintainer
+S: United Kingdom
+
 N: Daniel Quinlan
 E: quinlan@pathname.com
 W: http://www.pathname.com/~quinlan/

MAINTAINERS

@@ -1661,7 +1661,6 @@ S:	Maintained
 F:	drivers/net/wireless/b43legacy/
 
 BACKLIGHT CLASS/SUBSYSTEM
-M:	Richard Purdie <rpurdie@rpsys.net>
 M:	Jingoo Han <jg1.han@samsung.com>
 S:	Maintained
 F:	drivers/video/backlight/