Remove System.out.println() stuff

src/main/java/com/velocitypowered/proxy/connection/backend/LoginSessionHandler.java

@@ -23,14 +23,12 @@ public class LoginSessionHandler implements MinecraftSessionHandler {
         }
 
         if (packet instanceof SetCompression) {
-            System.out.println("Enabling compression on server connection, this is inefficient!");
             SetCompression sc = (SetCompression) packet;
             connection.getChannel().setCompressionThreshold(sc.getThreshold());
         }
 
         if (packet instanceof ServerLoginSuccess) {
             // the player has been logged on.
-            System.out.println("Player connected to remote server");
             connection.getChannel().setState(StateRegistry.PLAY);
             connection.getProxyPlayer().setConnectedServer(connection);
             connection.getProxyPlayer().getConnection().setSessionHandler(new com.velocitypowered.proxy.connection.client.PlaySessionHandler(connection.getProxyPlayer()));

src/main/java/com/velocitypowered/proxy/connection/backend/PlaySessionHandler.java

@@ -21,7 +21,6 @@ public class PlaySessionHandler implements MinecraftSessionHandler {
         if (packet instanceof Ping) {
             // Make sure to reply back to the server so it doesn't think we're gone.
             connection.getChannel().write(packet);
-            connection.getProxyPlayer().getConnection().write(packet);
         } else if (packet instanceof Disconnect) {
             // The server wants to disconnect us. TODO fallback handling
             Disconnect original = (Disconnect) packet;

src/main/java/com/velocitypowered/proxy/connection/client/StatusSessionHandler.java

@@ -36,7 +36,6 @@ public class StatusSessionHandler implements MinecraftSessionHandler {
         }
 
         // Status request
-        System.out.println("Got status request!");
         ServerPing ping = new ServerPing(
                 new ServerPing.Version(340, "1.12.2"),
                 new ServerPing.Players(0, 0),

src/main/java/com/velocitypowered/proxy/protocol/netty/LegacyPingEncoder.java

@@ -24,7 +24,6 @@ public class LegacyPingEncoder extends MessageToByteEncoder<LegacyPingResponse>
         String serializedResponse = serialize(msg);
         out.writeShort(serializedResponse.length());
         out.writeBytes(serializedResponse.getBytes(StandardCharsets.UTF_16BE));
-        System.out.println(ByteBufUtil.prettyHexDump(out));
     }
 
     private String serialize(LegacyPingResponse response) {

src/main/java/com/velocitypowered/proxy/protocol/netty/MinecraftDecoder.java

@@ -40,7 +40,6 @@ public class MinecraftDecoder extends MessageToMessageDecoder<ByteBuf> {
                 throw new CorruptedFrameException("Error decoding " + packet.getClass() + " Direction " + direction
                         + " Protocol " + protocolVersion + " State " + state + " ID " + Integer.toHexString(packetId), e);
             }
-            System.out.println("IN: " + packet);
             out.add(new PacketWrapper(packet, slice));
         }
     }

src/main/java/com/velocitypowered/proxy/protocol/netty/MinecraftEncoder.java

@@ -25,7 +25,6 @@ public class MinecraftEncoder extends MessageToByteEncoder<MinecraftPacket> {
         int packetId = mappings.getId(msg);
         ProtocolUtils.writeVarInt(out, packetId);
         msg.encode(out, direction, protocolVersion);
-        System.out.println("OUT: " + msg);
     }
 
     public int getProtocolVersion() {