[XFS] Update the MAINTAINERS file entry for XFS.

Remove David Chatterton from XFS entry in MAINTAINERS file.

Signed-off-by: Tim Shimmin <tes@sgi.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 4c715a7..8fa3005 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4012,7 +4012,7 @@
 
 XFS FILESYSTEM
 P:	Silicon Graphics Inc
-P:	Tim Shimmin, David Chatterton
+P:	Tim Shimmin
 M:	xfs-masters@oss.sgi.com
 L:	xfs@oss.sgi.com
 W:	http://oss.sgi.com/projects/xfs