NO-JIRA removing useless assertionRemainingMessages

JMSTestCase is deprecated anyway.
in its older form many many years ago a server would be reused over
between tests.

what forced us to make such verification to avoid messages from one test
leaking into the next.

This was because a server startup was expensive many years ago (less
efficient code and the hardware available 10 years ago)

with the current state of things this is not needed as the server will
be started from scratch on every test

tests/jms-tests/src/test/java/org/apache/activemq/artemis/jms/tests/JMSTestCase.java

@@ -69,8 +69,6 @@ public void setUp() throws Exception {
       cf = new ActiveMQJMSConnectionFactory("tcp://127.0.0.1:61616?blockOnAcknowledge=true&blockOnDurableSend=true&blockOnNonDurableSend=true");
       queueCf = new ActiveMQQueueConnectionFactory("tcp://127.0.0.1:61616?blockOnAcknowledge=true&blockOnDurableSend=true&blockOnNonDurableSend=true");
       topicCf = new ActiveMQTopicConnectionFactory("tcp://127.0.0.1:61616?blockOnAcknowledge=true&blockOnDurableSend=true&blockOnNonDurableSend=true");
-
-      assertRemainingMessages(0);
    }
 
    protected final JMSContext createContext() {
@@ -115,8 +113,6 @@ public void tearDown() throws Exception {
       }
 
       cf = null;
-
-      assertRemainingMessages(0);
    }
 
    protected Connection createConnection(ConnectionFactory cf1) throws JMSException {