staging: r8188eu: remove rtw_update_mem_stat macro and associated flags

Remove the unused rtw_update_mem_stat macro and the associated flags
from include/osdep_service.h as this is all dead code.
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20210818234853.208448-8-phil@philpotter.co.ukSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/include/osdep_service.h

@@ -146,32 +146,12 @@ static inline void rtw_netif_stop_queue(struct net_device *pnetdev)
 
 extern int RTW_STATUS_CODE(int error_code);
 
-/* flags used for rtw_update_mem_stat() */
-enum {
-	MEM_STAT_VIR_ALLOC_SUCCESS,
-	MEM_STAT_VIR_ALLOC_FAIL,
-	MEM_STAT_VIR_FREE,
-	MEM_STAT_PHY_ALLOC_SUCCESS,
-	MEM_STAT_PHY_ALLOC_FAIL,
-	MEM_STAT_PHY_FREE,
-	MEM_STAT_TX, /* used to distinguish TX/RX, asigned from caller */
-	MEM_STAT_TX_ALLOC_SUCCESS,
-	MEM_STAT_TX_ALLOC_FAIL,
-	MEM_STAT_TX_FREE,
-	MEM_STAT_RX, /* used to distinguish TX/RX, asigned from caller */
-	MEM_STAT_RX_ALLOC_SUCCESS,
-	MEM_STAT_RX_ALLOC_FAIL,
-	MEM_STAT_RX_FREE
-};
-
 extern unsigned char MCS_rate_2R[16];
 extern unsigned char MCS_rate_1R[16];
 extern unsigned char RTW_WPA_OUI[];
 extern unsigned char WPA_TKIP_CIPHER[4];
 extern unsigned char RSN_TKIP_CIPHER[4];
 
-#define rtw_update_mem_stat(flag, sz) do {} while (0)
-
 void *rtw_malloc2d(int h, int w, int size);
 
 u32  _rtw_down_sema(struct semaphore *sema);