[PATCH] kernel-doc: remove Martin from MAINTAINERS

I don't have the time to work on Linux Documentation, so I really should
document that in MAINTAINERS.  With Randy, kernel-doc is in good hands
anyway.

Signed-off-by: Martin Waitz <tali@admingilde.org>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>