staging:r8188eu: remove unused HW_VAR_RF_TYPE parameter of HT_caps_handler

rtw_hal_get_hwreg() does not used with HW_VAR_RF_TYPE parameter.
Remove HW_VAR_RF_TYPE switch case in rtw_hal_get_hwreg and definition.
Signed-off-by: Ivan Safonov <insafonov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/hal/usb_halinit.c

@@ -1745,9 +1745,6 @@ void rtw_hal_get_hwreg(struct adapter *Adapter, u8 variable, u8 *val)
 		/* BCN_VALID, BIT16 of REG_TDECTRL = BIT0 of REG_TDECTRL+2 */
 		val[0] = (BIT(0) & usb_read8(Adapter, REG_TDECTRL+2)) ? true : false;
 		break;
-	case HW_VAR_RF_TYPE:
-		val[0] = RF_1T1R;
-		break;
 	case HW_VAR_FWLPS_RF_ON:
 		{
 			/* When we halt NIC, we should check if FW LPS is leave. */

drivers/staging/rtl8188eu/include/hal_intf.h

@@ -57,7 +57,6 @@ enum hw_variables {
 	HW_VAR_ACK_PREAMBLE,
 	HW_VAR_SEC_CFG,
 	HW_VAR_BCN_VALID,
-	HW_VAR_RF_TYPE,
 	HW_VAR_DM_FUNC_OP,
 	HW_VAR_DM_FUNC_SET,
 	HW_VAR_DM_FUNC_CLR,