staging: rtl8192u: dm_shadow_init() is not used

The function dm_shadow_init() is not used anywhere, remove it.
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20230312073247.9822-3-straube.linux@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192u/r8192U_dm.c

@@ -2859,44 +2859,6 @@ void dm_check_fsync(struct net_device *dev)
 	}
 }
 
-/*-----------------------------------------------------------------------------
- * Function:	dm_shadow_init()
- *
- * Overview:	Store all NIC MAC/BB register content.
- *
- * Input:		NONE
- *
- * Output:		NONE
- *
- * Return:		NONE
- *
- * Revised History:
- *	When		Who		Remark
- *	05/29/2008	amy		Create Version 0 porting from windows code.
- *
- *---------------------------------------------------------------------------
- */
-void dm_shadow_init(struct net_device *dev)
-{
-	u8	page;
-	u16	offset;
-
-	for (page = 0; page < 5; page++)
-		for (offset = 0; offset < 256; offset++) {
-			read_nic_byte(dev, offset + page * 256, &dm_shadow[page][offset]);
-			/*DbgPrint("P-%d/O-%02x=%02x\r\n", page, offset, DM_Shadow[page][offset]);*/
-		}
-
-	for (page = 8; page < 11; page++)
-		for (offset = 0; offset < 256; offset++)
-			read_nic_byte(dev, offset + page * 256, &dm_shadow[page][offset]);
-
-	for (page = 12; page < 15; page++)
-		for (offset = 0; offset < 256; offset++)
-			read_nic_byte(dev, offset + page * 256, &dm_shadow[page][offset]);
-
-}   /* dm_shadow_init */
-
 /*---------------------------Define function prototype------------------------*/
 /*-----------------------------------------------------------------------------
  * Function:	DM_DynamicTxPower()

drivers/staging/rtl8192u/r8192U_dm.h

@@ -168,7 +168,6 @@ void dm_rf_operation_test_callback(unsigned long data);
 void dm_rf_pathcheck_workitemcallback(struct work_struct *work);
 void dm_fsync_work_callback(struct work_struct *work);
 void dm_cck_txpower_adjust(struct net_device *dev, bool  binch14);
-void dm_shadow_init(struct net_device *dev);
 void dm_initialize_txpower_tracking(struct net_device *dev);
 /*--------------------------Exported Function prototype---------------------*/