Remove assumption about how the timeout feature is implemented.

Original commit: elastic/x-pack-elasticsearch@7a4fa000c1

plugin/src/test/java/org/elasticsearch/xpack/graph/test/GraphTests.java

@@ -237,11 +237,6 @@ public class GraphTests extends XPackSingleNodeTestCase {
         // intended delay but sometimes this doesn't happen so I commented this line out.
         
         // checkVertexDepth(response, 1, "dave");     
-
-        // This is the point where we should certainly have run out of time due
-        // to the test query plugin with a deliberate pause
-        assertNull("Should have timed out trying to crawl out to kurt", response.getVertex(Vertex.createId("people","kurt")));
-        
     }
     
     public void testNonDiversifiedCrawl() {