staging: r8188eu: remove unused externl variables

Remove a group of external variables which are not used in
osdep_service.h or in the files where osdep_service.h is included.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220115165536.231210-2-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/include/osdep_service.h

@@ -99,12 +99,6 @@ static inline void rtw_netif_stop_queue(struct net_device *pnetdev)
 
 extern int RTW_STATUS_CODE(int error_code);
 
-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];
-
 void *rtw_malloc2d(int h, int w, int size);
 
 #define rtw_init_queue(q)					\