Reenable UnicastZenPingTests#testSimplePings

* This was muted needlessly, the problem in #26701 only applies to `6.x`
* Relates #26701

server/src/test/java/org/elasticsearch/discovery/zen/UnicastZenPingTests.java

@@ -135,7 +135,6 @@ public void tearDown() throws Exception {
         }
     }
 
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/26701")
     public void testSimplePings() throws IOException, InterruptedException, ExecutionException {
         // use ephemeral ports
         final Settings settings = Settings.builder().put("cluster.name", "test").put(TransportSettings.PORT.getKey(), 0).build();