remove unuse code

Author: lvs007

src/main/java/org/tron/common/overlay/server/HandshakeHandler.java

@@ -37,7 +37,6 @@
 import org.tron.common.overlay.message.ReasonCode;
 import org.tron.core.config.args.Args;
 import org.tron.core.db.Manager;
-import org.tron.core.net.node.NodeImpl;
 import org.tron.core.net.peer.PeerConnection;
 
 @Component
@@ -57,10 +56,7 @@ public class HandshakeHandler extends ByteToMessageDecoder {
   private Manager manager;
 
   private  P2pMessageFactory messageFactory = new P2pMessageFactory();
-
-  @Autowired
-  private NodeImpl node;
-
+  
   @Autowired
   private SyncPool syncPool;