staging: rtl8723bs: core: rtw_cmd: drop unneeded null test

kfree returns immediately on NULL so the tests are not needed.

Generated by: scripts/coccinelle/free/ifnullfree.cocci

CC: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/core/rtw_ap.c

@@ -1855,7 +1855,6 @@ static void update_bcn_wps_ie(struct adapter *padapter)
 		pnetwork->IELength = wps_offset + (wps_ielen+2) + remainder_ielen;
 	}
 
-	if (pbackup_remainder_ie)
 	kfree(pbackup_remainder_ie);
 
 	/*  deal with the case without set_tx_beacon_cmd() in update_beacon() */