polishing, fixed warning messages

spring-integration-ip/src/main/java/org/springframework/integration/ip/tcp/connection/TcpNetClientConnectionFactory.java

@@ -20,8 +20,6 @@ import java.net.Socket;
 
 import javax.net.SocketFactory;
 
-import org.springframework.integration.MessagingException;
-
 /**
  * A client connection factory that creates {@link TcpNetConnection}s. 
  * @author Gary Russell

spring-integration-ip/src/test/java/org/springframework/integration/ip/tcp/connection/TcpNioConnectionTests.java

@@ -50,6 +50,7 @@ public class TcpNioConnectionTests {
 		factory.start();
 		final CountDownLatch latch = new CountDownLatch(1);
 		Executors.newSingleThreadExecutor().execute(new Runnable() {
+			@SuppressWarnings("unused")
 			public void run() {
 				try {
 					ServerSocket server = ServerSocketFactory.getDefault().createServerSocket(port);

spring-integration-ip/src/test/java/org/springframework/integration/ip/tcp/serializer/LenghtHeaderSerializationTests.java

@@ -16,7 +16,6 @@
 package org.springframework.integration.ip.tcp.serializer;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
 import java.io.ByteArrayInputStream;