[PATCH] rtl8xxxu: Remove set but not used variables 'usedesc40' and 'seq_number'

[YueHaibing]

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c: In function 
'rtl8xxxu_tx':
drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c:4925:7: warning:
 variable 'usedesc40' set but not used [-Wunused-but-set-variable]

drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c:4921:6: warning:
 variable 'seq_number' set but not used [-Wunused-but-set-variable]

'usedesc40' and 'seq_number' are not used any more after
commit b59415c2dd08 ("rtl8xxxu: Split filling of TX descriptors into separate 
functions")

Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c 
b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
index 73f6fc0..56040b1 100644
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
@@ -4918,11 +4918,10 @@ static void rtl8xxxu_tx(struct ieee80211_hw *hw,
        struct device *dev = &priv->udev->dev;
        u32 queue, rts_rate;
        u16 pktlen = skb->len;
-       u16 seq_number;
        u16 rate_flag = tx_info->control.rates[0].flags;
        int tx_desc_size = priv->fops->tx_desc_size;
        int ret;
-       bool usedesc40, ampdu_enable, sgi = false, short_preamble = false;
+       bool ampdu_enable, sgi = false, short_preamble = false;
 
        if (skb_headroom(skb) < tx_desc_size) {
                dev_warn(dev,
@@ -4946,7 +4945,6 @@ static void rtl8xxxu_tx(struct ieee80211_hw *hw,
        if (ieee80211_is_action(hdr->frame_control))
                rtl8xxxu_dump_action(dev, hdr);
 
-       usedesc40 = (tx_desc_size == 40);
        tx_info->rate_driver_data[0] = hw;
 
        if (control && control->sta)
@@ -5013,7 +5011,6 @@ static void rtl8xxxu_tx(struct ieee80211_hw *hw,
        else
                rts_rate = 0;
 
-       seq_number = IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
 
        priv->fops->fill_txdesc(hw, hdr, tx_info, tx_desc, sgi, short_preamble,
                                ampdu_enable, rts_rate);