staging: r8188eu: remove empty rtw_fwdbg_event_callback

Remove the empty function rtw_fwdbg_event_callback.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220322202439.157999-5-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_fwdbg_event_callback(struct adapter *adapter, u8 *pbuf)
-{
-}
-
 static void free_scanqueue(struct	mlme_priv *pmlmepriv)
 {
 	struct __queue *free_queue = &pmlmepriv->free_bss_pool;

drivers/staging/r8188eu/include/rtw_mlme_ext.h

@@ -744,8 +744,6 @@ struct C2HEvent_Header {
 	unsigned int rsvd;
 };
 
-void rtw_fwdbg_event_callback(struct adapter *adapter, u8 *pbuf);
-
 enum rtw_c2h_event {
 	GEN_EVT_CODE(_Read_MACREG) = 0, /*0*/
 	GEN_EVT_CODE(_Read_BBREG),
@@ -799,7 +797,7 @@ static struct fwevent wlanevents[] = {
 	{0, NULL},
 	{0, NULL},
 	{0, NULL},
-	{0, rtw_fwdbg_event_callback},
+	{0, NULL},
 	{0, NULL},	 /*20*/
 	{0, NULL},
 	{0, NULL},