MAINTAINERS: remove myself as reviewer

Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Author: Darrick J. Wong

MAINTAINERS

@@ -25990,7 +25990,6 @@ F:	include/xen/swiotlb-xen.h
 
 XFS FILESYSTEM
 M:	Carlos Maiolino <cem@kernel.org>
-R:	Darrick J. Wong <djwong@kernel.org>
 L:	linux-xfs@vger.kernel.org
 S:	Supported
 W:	http://xfs.org/