staging: r8188eu: remove HW_VAR_BASIC_RATE from GetHwReg8188EU()

GetHwReg8188EU() is never called with HW_VAR_BASIC_RATE. Remove that
case from the function.
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20220107215033.12257-2-straube.linux@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/hal/usb_halinit.c

@@ -1594,9 +1594,6 @@ void GetHwReg8188EU(struct adapter *Adapter, u8 variable, u8 *val)
 	struct odm_dm_struct *podmpriv = &haldata->odmpriv;
 
 	switch (variable) {
-	case HW_VAR_BASIC_RATE:
-		*((u16 *)(val)) = haldata->BasicRateSet;
-		fallthrough;
 	case HW_VAR_TXPAUSE:
 		val[0] = rtw_read8(Adapter, REG_TXPAUSE);
 		break;