Clean up old In/OutPacket

src/main/java/net/netty/InPacket.java

@@ -1,4 +0,0 @@
-package net.netty;
-
-public class InPacket {
-}

src/main/java/net/netty/OutPacket.java

@@ -1,5 +0,0 @@
-package net.netty;
-
-public interface OutPacket {
-    byte[] getBytes();
-}