platform/wifi: drop *_get_wowlan()

It's redundant and was probably just left in a an oversight.
*_get_wake_on_wlan() now does the same thing.

src/platform/nm-linux-platform.c

@@ -6191,7 +6191,7 @@ link_get_wake_on_lan (NMPlatform *platform, int ifindex)
 		if (!wifi_data)
 			return FALSE;
 
-		return wifi_utils_get_wowlan (wifi_data);
+		return wifi_utils_get_wake_on_wlan (wifi_data) != NM_SETTING_WIRELESS_WAKE_ON_WLAN_NONE;
 	} else
 		return FALSE;
 }