removes a left out printStackTrace() and an unrelated log message

src/net/java/sip/communicator/impl/protocol/sip/SipStackSharing.java

@@ -280,9 +280,6 @@ private void createProvider(int preferredPort, int retries, boolean secure)
         }
         catch(InvalidArgumentException ex)
         {
-            logger.trace(java.util.Locale.getDefault().toString());
-            ex.printStackTrace();
-
             // makes sure we didn't leave an open listener
             // as both UDP and TCP listener have to bind to the same port
             if(tlsLP != null)