Implement openobserve#14 fix in openobserve#15 to pass tests

Author: jealouscloud

package.json

@@ -57,7 +57,7 @@
     "eslint-plugin-deprecation": "^2.0.0"
   },
   "engines": {
-    "node": ">=16"
+    "node": ">=18"
   },
   "dependencies": {
     "@emotion/css": "^11.1.3",

src/components/QueryEditor.tsx

@@ -32,12 +32,6 @@ export const QueryEditor = ({ query, onChange, onRunQuery, datasource, app, data
     setIsLoading(isLoading.slice(1));
   };
 
-  const isInDashboard = useMemo(() => app === 'panel-editor', [app]);
-
-  const getTimeStampColumnName = () => {
-    return datasource.instanceSettings?.jsonData?.timestamp_column || '_timestamp';
-  };
-
   useEffect(() => {
     startLoading();
     getOrganizations({ url: datasource.url, page_num: 0, page_size: 1000, sort_by: 'id' })