MAINTAINERS: platform/chrome: remove myself as maintainer

Benson has been maintaining this together with the rest of the kernel
team for a while now, so remove myself from the entry.
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Benson Leung <bleung@chromium.org>

MAINTAINERS

@@ -3549,7 +3549,6 @@ F:	drivers/input/touchscreen/chipone_icn8505.c
 
 CHROME HARDWARE PLATFORM SUPPORT
 M:	Benson Leung <bleung@chromium.org>
-M:	Olof Johansson <olof@lixom.net>
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/bleung/chrome-platform.git
 F:	drivers/platform/chrome/