MAINTAINERS: Remove the old s390-virtio machine

The old s390-virtio machine has been removed last year, so we don't
need the corresponding section in the MAINTAINERS file anymore.
Signed-off-by: NThomas Huth <thuth@redhat.com>
Message-Id: <1456394274-21082-1-git-send-email-thuth@redhat.com>
Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>

MAINTAINERS

@@ -656,12 +656,6 @@ F: hw/*/grlib*
 
 S390 Machines
 -------------
-S390 Virtio
-M: Alexander Graf <agraf@suse.de>
-S: Maintained
-F: hw/s390x/s390-*.c
-X: hw/s390x/*pci*.[hc]
-
 S390 Virtio-ccw
 M: Cornelia Huck <cornelia.huck@de.ibm.com>
 M: Christian Borntraeger <borntraeger@de.ibm.com>