staging: r8188eu: remove HW_VAR_EFUSE_BYTES from GetHwReg8188EU()

GetHwReg8188EU() is never called with HW_VAR_EFUSE_BYTES. Remove that
case from the function.
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20220107215033.12257-5-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_EFUSE_BYTES: /*  To get EFUE total used bytes, added by Roger, 2008.12.22. */
-		*((u16 *)(val)) = haldata->EfuseUsedBytes;
-		break;
 	case HW_VAR_APFM_ON_MAC:
 		*val = haldata->bMacPwrCtrlOn;
 		break;