staging: r8188eu: remove HW_VAR_CURRENT_ANTENNA from GetHwReg8188EU()

GetHwReg8188EU() is never called with HW_VAR_CURRENT_ANTENNA. Remove
that case from the function.
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20220107215033.12257-4-straube.linux@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/hal/usb_halinit.c

@@ -1616,9 +1616,6 @@ void GetHwReg8188EU(struct adapter *Adapter, u8 variable, u8 *val)
 			}
 		}
 		break;
-	case HW_VAR_CURRENT_ANTENNA:
-		val[0] = haldata->CurAntenna;
-		break;
 	case HW_VAR_EFUSE_BYTES: /*  To get EFUE total used bytes, added by Roger, 2008.12.22. */
 		*((u16 *)(val)) = haldata->EfuseUsedBytes;
 		break;

drivers/staging/r8188eu/include/hal_intf.h

@@ -55,7 +55,6 @@ enum hw_variables {
 	HW_VAR_INITIAL_GAIN,
 	HW_VAR_BT_SET_COEXIST,
 	HW_VAR_BT_ISSUE_DELBA,
-	HW_VAR_CURRENT_ANTENNA,
 	HW_VAR_ANTENNA_DIVERSITY_LINK,
 	HW_VAR_ANTENNA_DIVERSITY_SELECT,
 	HW_VAR_SWITCH_EPHY_WoWLAN,