Fix linter warning for unused variable '_'

src/utils/api-client.js

@@ -132,6 +132,7 @@ export function connect_lam_ws(api_url, update_state) {
     if (!data) {
       return
     }
+    /*eslint no-unused-vars: "off"*/
     let [_, stationIdStr, sensorIdStr] = topic.split('/');
     const stationId = parseInt(stationIdStr, 10);
     const sensorId = parseInt(sensorIdStr, 10);