PingManager: Don't register IQProvider since this is done by smack.providers already. This line was actually a leftover from aSmack development.

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@13406 b35dd754-fafc-0310-a699-88a17e54d16e

source/org/jivesoftware/smackx/ping/PingManager.java

@@ -61,7 +61,6 @@ public class PingManager {
             Collections.synchronizedMap(new WeakHashMap<Connection, PingManager>());
     
     static {
-        ProviderManager.getInstance().addIQProvider(ELEMENT, NAMESPACE, new PingProvider());
         Connection.addConnectionCreationListener(new ConnectionCreationListener() {
             public void connectionCreated(Connection connection) {
                 new PingManager(connection);