Remove filter for non-existent middleware.

Change-Id: Ib9b04c2733cac954b6acb87ddaaeb175f25319d1
Original-author: Peter Portante <peter.portante@redhat.com>
Signed-off-by: Peter Portante <peter.portante@redhat.com>
Signed-off-by: Prashanth Pai <ppai@redhat.com>
Reviewed-on: http://review.gluster.org/5698
Reviewed-by: Peter Portante <pportant@redhat.com>
Reviewed-by: Luis Pabon <lpabon@redhat.com>
Tested-by: Luis Pabon <lpabon@redhat.com>