mt76x0: remove unused stat_work

Remove unused definition of stat_work delayed_work definition and
related flush/cancel routines

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt76x0/init.c

@@ -362,8 +362,6 @@ static void mt76x0_mac_stop_hw(struct mt76x0_dev *dev)
 void mt76x0_mac_stop(struct mt76x0_dev *dev)
 {
 	mt76x0_mac_stop_hw(dev);
-	flush_delayed_work(&dev->stat_work);
-	cancel_delayed_work_sync(&dev->stat_work);
 }
 
 static void mt76x0_stop_hardware(struct mt76x0_dev *dev)

drivers/net/wireless/mediatek/mt76/mt76x0/mt76x0.h

@@ -84,8 +84,6 @@ struct mt76x0_dev {
 	struct delayed_work cal_work;
 	struct delayed_work mac_work;
 
-	struct delayed_work stat_work;
-
 	spinlock_t mac_lock;
 
 	const u16 *beacon_offsets;