staging: r8188eu: remove empty rtw_dummy_event_callback

Remove the empty function rtw_dummy_event_callback.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220322202439.157999-4-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/core/rtw_mlme.c

@@ -747,10 +747,6 @@ void rtw_surveydone_event_callback(struct adapter	*adapter, u8 *pbuf)
 	rtw_os_xmit_schedule(adapter);
 }
 
-void rtw_dummy_event_callback(struct adapter *adapter, u8 *pbuf)
-{
-}
-
 void rtw_fwdbg_event_callback(struct adapter *adapter, u8 *pbuf)
 {
 }

drivers/staging/r8188eu/include/rtw_mlme_ext.h

@@ -744,7 +744,6 @@ struct C2HEvent_Header {
 	unsigned int rsvd;
 };
 
-void rtw_dummy_event_callback(struct adapter *adapter, u8 *pbuf);
 void rtw_fwdbg_event_callback(struct adapter *adapter, u8 *pbuf);
 
 enum rtw_c2h_event {
@@ -781,7 +780,7 @@ enum rtw_c2h_event {
 #ifdef _RTW_MLME_EXT_C_
 
 static struct fwevent wlanevents[] = {
-	{0, rtw_dummy_event_callback},	/*0*/
+	{0, NULL},	/*0*/
 	{0, NULL},
 	{0, NULL},
 	{0, NULL},
@@ -795,7 +794,7 @@ static struct fwevent wlanevents[] = {
 	{sizeof(struct stassoc_event), &rtw_stassoc_event_callback},
 	{sizeof(struct stadel_event), &rtw_stadel_event_callback},
 	{0, NULL},
-	{0, rtw_dummy_event_callback},
+	{0, NULL},
 	{0, NULL},	/*15*/
 	{0, NULL},
 	{0, NULL},