rtw88: remove unused lps state check helper

This is no more used, remove it.
Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/realtek/rtw88/ps.c

@@ -91,11 +91,6 @@ static void rtw_enter_lps_core(struct rtw_dev *rtwdev)
 	set_bit(RTW_FLAG_LEISURE_PS, rtwdev->flags);
 }
 
-bool rtw_in_lps(struct rtw_dev *rtwdev)
-{
-	return test_bit(RTW_FLAG_LEISURE_PS, rtwdev->flags);
-}
-
 void rtw_enter_lps(struct rtw_dev *rtwdev, u8 port_id)
 {
 	struct rtw_lps_conf *conf = &rtwdev->lps_conf;

drivers/net/wireless/realtek/rtw88/ps.h

@@ -12,6 +12,5 @@ int rtw_leave_ips(struct rtw_dev *rtwdev);
 
 void rtw_enter_lps(struct rtw_dev *rtwdev, u8 port_id);
 void rtw_leave_lps(struct rtw_dev *rtwdev);
-bool rtw_in_lps(struct rtw_dev *rtwdev);
 
 #endif