rtlwifi: remove set but not used variable 'cmd_seq'

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

drivers/net/wireless/realtek/rtlwifi/base.c: In function 'rtl_c2h_content_parsing':
drivers/net/wireless/realtek/rtlwifi/base.c:2313:13: warning:
 variable 'cmd_seq' set but not used [-Wunused-but-set-variable]
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/realtek/rtlwifi/base.c

@@ -2311,11 +2311,10 @@ static void rtl_c2h_content_parsing(struct ieee80211_hw *hw,
 	struct rtl_priv *rtlpriv = rtl_priv(hw);
 	struct rtl_hal_ops *hal_ops = rtlpriv->cfg->ops;
 	const struct rtl_btc_ops *btc_ops = rtlpriv->btcoexist.btc_ops;
-	u8 cmd_id, cmd_seq, cmd_len;
+	u8 cmd_id, cmd_len;
 	u8 *cmd_buf = NULL;
 
 	cmd_id = GET_C2H_CMD_ID(skb->data);
-	cmd_seq = GET_C2H_SEQ(skb->data);
 	cmd_len = skb->len - C2H_DATA_OFFSET;
 	cmd_buf = GET_C2H_DATA_PTR(skb->data);