staging: rtl8723bs: remove DBG_COUNTER definition from rtw_debug.h

Remove DBG_COUNTER macro definition from include/rtw_debug.h, as
all uses of it have now been removed and it is no longer required.
The DBG_COUNTER incremented values were never actually used anywhere
else in the driver.
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20210215233440.80617-6-phil@philpotter.co.ukSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/include/rtw_debug.h

@@ -252,12 +252,6 @@
 #endif /* defined(_dbgdump) */
 #endif /* DEBUG_RTL871X */
 
-#ifdef CONFIG_DBG_COUNTER
-#define DBG_COUNTER(counter) counter++
-#else
-#define DBG_COUNTER(counter) do {} while (0)
-#endif
-
 void dump_drv_version(void *sel);
 void dump_log_level(void *sel);