Omit unnecessary null check

Signed-off-by: Nico Piel <nico.piel@hotmail.de>

Author: NicoPiel

donkey/src/main/java/com/mirth/connect/donkey/server/channel/DestinationChain.java

@@ -68,7 +68,7 @@ public List<ConnectorMessage> call() throws InterruptedException {
 
         try (CloseableThreadContext.Instance ctc = CloseableThreadContext
                 .put("channelId", channelId)
-                .put("channelName", channelName != null ? channelName : "")
+                .put("channelName", channelName)
         ) {
             try {
                 Thread.currentThread().setName(name + " < " + originalThreadName);