fixup! fixup! Remove getExternalUrlForQueryId and getRoutingGroupForQueryId

Author: oneonestar

gateway-ha/src/main/java/io/trino/gateway/ha/handler/RoutingTargetHandler.java

@@ -71,6 +71,8 @@ public RoutingTargetResponse resolveRouting(HttpServletRequest request)
         if (queryId.isPresent()) {
             // Query ID based routing
             previousCluster = queryId.map(routingManager::findBackendForQueryId);
+            // Setting routingGroup to empty because the info is not being used.
+            // This should be refactored in the future to include routingGroup info if needed instead of leaving it empty.
             routingTargetResponse = previousCluster.map(cluster -> new RoutingTargetResponse(
                     new RoutingDestination("", cluster, buildUriWithNewCluster(cluster, request), cluster),
                     request));