xprtrdma: No qp_event disconnect

After thinking about this more, and auditing other kernel ULP imple-
mentations, I believe that a DISCONNECT cm_event will occur after a
fatal QP event. If that's the case, there's no need for an explicit
disconnect in the QP event handler.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

net/sunrpc/xprtrdma/xprt_rdma.h

@@ -101,7 +101,6 @@ struct rpcrdma_ep {
 	wait_queue_head_t 	rep_connect_wait;
 	struct rpcrdma_connect_private	rep_cm_private;
 	struct rdma_conn_param	rep_remote_cma;
-	struct delayed_work	rep_disconnect_worker;
 	int			rep_receive_count;
 };