staging: r8188eu: remove empty function _InitOperationMode

The definition of function _InitOperationMode is empty. Remove it.
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
Link: https://lore.kernel.org/r/07083cbb8b09957d2fcf9e5b70e0fd832ce53f35.1644422181.git.abdun.nihaal@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/hal/usb_halinit.c

@@ -449,10 +449,6 @@ static void InitUsbAggregationSetting(struct adapter *Adapter)
 	usb_AggSettingRxUpdate(Adapter);
 }
 
-static void _InitOperationMode(struct adapter *Adapter)
-{
-}
-
 static void _InitBeaconParameters(struct adapter *Adapter)
 {
 	struct hal_data_8188e *haldata = &Adapter->haldata;
@@ -635,7 +631,6 @@ u32 rtl8188eu_hal_init(struct adapter *Adapter)
 	_InitEDCA(Adapter);
 	_InitRetryFunction(Adapter);
 	InitUsbAggregationSetting(Adapter);
-	_InitOperationMode(Adapter);/* todo */
 	_InitBeaconParameters(Adapter);
 
 	/*  */