Remove unnecessary check

When this test is run from QueueControlUsingCoreTest the connection
count check will fail because of the request/reply semantics of the
test itself.

tests/integration-tests/src/test/java/org/apache/activemq/artemis/tests/integration/management/QueueControlTest.java

@@ -539,7 +539,6 @@ public class QueueControlTest extends ManagementTestBase
 
       assertEquals(2, srvqueue.getDeliveringCount());
       assertEquals(2, srvqueue.getConsumerCount());
-      assertEquals(2, server.getConnectionCount());
 
       System.out.println(queueControl.listDeliveringMessagesAsJSON());