staging: rtl8188eu: Remove unused iw_operation_mode[]

Remove unused iw_operation_mode array.
Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Link: https://lore.kernel.org/r/20210721112829.17317-1-fmdefrancesco@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/os_dep/ioctl_linux.c

@@ -46,11 +46,6 @@ static u32 rtw_rates[] = {1000000, 2000000, 5500000, 11000000,
 	6000000, 9000000, 12000000, 18000000, 24000000, 36000000,
 	48000000, 54000000};
 
-static const char * const iw_operation_mode[] = {
-	"Auto", "Ad-Hoc", "Managed",  "Master", "Repeater",
-	"Secondary", "Monitor"
-};
-
 void indicate_wx_scan_complete_event(struct adapter *padapter)
 {
 	union iwreq_data wrqu;