staging: rtl8723bs: remove set but not used variable 'FirstConnect'

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

drivers/staging/rtl8723bs/hal/odm.c: In function 'odm_RSSIMonitorCheckCE':
drivers/staging/rtl8723bs/hal/odm.c:1258:7: warning:
 variable 'FirstConnect' set but not used [-Wunused-but-set-variable]
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20190731140903.304-1-yuehaibing@huawei.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/hal/odm.c

@@ -1255,13 +1255,11 @@ void odm_RSSIMonitorCheckCE(PDM_ODM_T pDM_Odm)
 	int tmpEntryMaxPWDB = 0, tmpEntryMinPWDB = 0xff;
 	u8 sta_cnt = 0;
 	u32 PWDB_rssi[NUM_STA] = {0};/* 0~15]:MACID, [16~31]:PWDB_rssi */
-	bool FirstConnect = false;
 	pRA_T pRA_Table = &pDM_Odm->DM_RA_Table;
 
 	if (pDM_Odm->bLinked != true)
 		return;
 
-	FirstConnect = (pDM_Odm->bLinked) && (pRA_Table->firstconnect == false);
 	pRA_Table->firstconnect = pDM_Odm->bLinked;
 
 	/* if (check_fwstate(&Adapter->mlmepriv, WIFI_AP_STATE|WIFI_ADHOC_STATE|WIFI_ADHOC_MASTER_STATE) == true) */