staging: r8188eu: remove unused define

The RTW_SUSPEND_LOCK_NAME define is not used. Remove it.
Acked-by: Michael Straube <straube.linux@gmail.com>
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20210908085747.32254-3-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/os_dep/osdep_service.c

@@ -97,8 +97,6 @@ void rtw_usleep_os(int us)
 		msleep((us / 1000) + 1);
 }
 
-#define RTW_SUSPEND_LOCK_NAME "rtw_wifi"
-
 static const struct device_type wlan_type = {
 	.name = "wlan",
 };