wil6210: Never delete Rx chain with firmware

Firmware crash on attempt to delete Rx chain.
Driver part of Rx chain removed only in preparation for the target reset;
as reset is the only flow that removes Rx chain in the firmware.

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/wil6210/txrx.c b/drivers/net/wireless/ath/wil6210/txrx.c
index 48cfa7e..1985951 100644
--- a/drivers/net/wireless/ath/wil6210/txrx.c
+++ b/drivers/net/wireless/ath/wil6210/txrx.c
@@ -511,10 +511,8 @@
 {
 	struct vring *vring = &wil->vring_rx;
 
-	if (vring->va) {
-		wmi_rx_chain_del(wil);
+	if (vring->va)
 		wil_vring_free(wil, vring, 0);
-	}
 }
 
 int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size,