rtlwifi: btcoex: remove redundant initialization of variables ant_num and single_ant_path

The variables ant_num and single_ant_path are being initialized with a
value that is never read and are being updated later with a new value.
The initializations are redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200723163214.995226-1-colin.king@canonical.com

drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtcoutsrc.c

@@ -1318,7 +1318,7 @@ bool exhalbtc_bind_bt_coex_withadapter(void *adapter)
 {
 	struct rtl_priv *rtlpriv = adapter;
 	struct btc_coexist *btcoexist = rtl_btc_coexist(rtlpriv);
-	u8 ant_num = 2, chip_type, single_ant_path = 0;
+	u8 ant_num, chip_type, single_ant_path;
 
 	if (!btcoexist)
 		return false;