xdp: Remove redundant warning

There is a warning in xdp_rxq_info_unreg_mem_model() when reg_state isn't
equal to REG_STATE_REGISTERED, so the warning in xdp_rxq_info_unreg() is
redundant.

Signed-off-by: Yajun Deng <yajun.deng@linux.dev>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Link: https://lore.kernel.org/r/20211027013856.1866-1-yajun.deng@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

net/core/xdp.c

@@ -143,8 +143,6 @@ void xdp_rxq_info_unreg(struct xdp_rxq_info *xdp_rxq)
 	if (xdp_rxq->reg_state == REG_STATE_UNUSED)
 		return;
 
-	WARN(!(xdp_rxq->reg_state == REG_STATE_REGISTERED), "Driver BUG");
-
 	xdp_rxq_info_unreg_mem_model(xdp_rxq);
 
 	xdp_rxq->reg_state = REG_STATE_UNREGISTERED;