wilc1000: remove redundant assignment to pointer vif

The assignment to pointer vif is redundant as the assigned value
is never read, hence it can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20201203174316.1071446-1-colin.king@canonical.com

drivers/net/wireless/microchip/wilc1000/wlan.c

@@ -685,7 +685,6 @@ int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
 			if (!tqe_q[ac])
 				continue;
 
-			vif = tqe_q[ac]->vif;
 			ac_exist = 1;
 			for (k = 0; (k < num_pkts_to_add[ac]) &&
 			     (!max_size_over) && tqe_q[ac]; k++) {