fix express in the POI test

Author: erik-krogh

javascript/ql/test/experimental/PoI/TestCustomPoIs.ql

@@ -24,7 +24,7 @@ class RouteSetupAndRouterAndRouteHandlerPoI extends ActivePoI {
   RouteSetupAndRouterAndRouteHandlerPoI() { this = "RouteSetupAndRouterAndRouteHandlerPoI" }
 
   override predicate is(Node l0, Node l1, string t1, Node l2, string t2) {
-    l0.(Express::RouteSetup).getRouter().flow() = l1 and
+    l0.(Express::RouteSetup).getRouter() = l1 and
     t1 = "router" and
     l0.(Express::RouteSetup).getARouteHandler() = l2 and
     t2 = "routehandler"