MAINTAINERS: remove myself as a Reviewer for Ceph

It has been a couple of years since I stepped down as CephFS maintainer.
I'm not involved in any meaningful way with the project these days, so
while I'm happy to help review the occasional patch, I don't need to be
cc'ed on all of them.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

Author: jtlayton

MAINTAINERS

@@ -4869,7 +4869,6 @@ F:	drivers/power/supply/cw2015_battery.c
 CEPH COMMON CODE (LIBCEPH)
 M:	Ilya Dryomov <idryomov@gmail.com>
 M:	Xiubo Li <xiubli@redhat.com>
-R:	Jeff Layton <jlayton@kernel.org>
 L:	ceph-devel@vger.kernel.org
 S:	Supported
 W:	http://ceph.com/
@@ -4881,7 +4880,6 @@ F:	net/ceph/
 CEPH DISTRIBUTED FILE SYSTEM CLIENT (CEPH)
 M:	Xiubo Li <xiubli@redhat.com>
 M:	Ilya Dryomov <idryomov@gmail.com>
-R:	Jeff Layton <jlayton@kernel.org>
 L:	ceph-devel@vger.kernel.org
 S:	Supported
 W:	http://ceph.com/