staging: rtl8188eu: remove unwanted assignment

remove an unwanted assignment to a variable which is overwritten in the
very next line.The first value assigned is not used.
Signed-off-by: NHari Prasath Gujulan Elango <hgujulan@visteon.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/hal/usb_halinit.c

@@ -2077,7 +2077,6 @@ static void UpdateHalRAMask8188EUsb(struct adapter *adapt, u32 mac_id, u8 rssi_l
 		break;
 	}
 
-	rate_bitmap = 0x0fffffff;
 	rate_bitmap = ODM_Get_Rate_Bitmap(&haldata->odmpriv, mac_id, mask, rssi_level);
 	DBG_88E("%s => mac_id:%d, networkType:0x%02x, mask:0x%08x\n\t ==> rssi_level:%d, rate_bitmap:0x%08x\n",
 		__func__, mac_id, networkType, mask, rssi_level, rate_bitmap);