Remove useless warn logging while disconnecting

Remove useless "handleDisconnection() called twice" logging.
This warning log every time player kicked by server.

Spigot-Server-Patches/0346-Optimize-Network-Manager-and-add-advanced-packet-sup.patch

@@ -28,7 +28,7 @@ and then catch exceptions and close if they fire.
 Part of this commit was authored by: Spottedleaf
 
 diff --git a/src/main/java/net/minecraft/server/NetworkManager.java b/src/main/java/net/minecraft/server/NetworkManager.java
-index b1dededc15cce686ead74a99bee64c89ac1de22c..289b17addd71aeab8a392e8f6a53d4c6329cf562 100644
+index b1dededc15cce686ead74a99bee64c89ac1de22c..32886109d03f9991446381160d5406056d2bf860 100644
 --- a/src/main/java/net/minecraft/server/NetworkManager.java
 +++ b/src/main/java/net/minecraft/server/NetworkManager.java
 @@ -64,6 +64,10 @@ public class NetworkManager extends SimpleChannelInboundHandler<Packet<?>> {
@@ -287,6 +287,15 @@ index b1dededc15cce686ead74a99bee64c89ac1de22c..289b17addd71aeab8a392e8f6a53d4c6
          // Spigot End
          if (this.channel.isOpen()) {
              this.channel.close(); // We can't wait as this may be called from an event loop.
+@@ -327,7 +472,7 @@ public class NetworkManager extends SimpleChannelInboundHandler<Packet<?>> {
+     public void handleDisconnection() {
+         if (this.channel != null && !this.channel.isOpen()) {
+             if (this.o) {
+-                NetworkManager.LOGGER.warn("handleDisconnection() called twice");
++                //NetworkManager.LOGGER.warn("handleDisconnection() called twice"); // Paper - Do not log useless message
+             } else {
+                 this.o = true;
+                 if (this.j() != null) {
 @@ -335,7 +480,7 @@ public class NetworkManager extends SimpleChannelInboundHandler<Packet<?>> {
                  } else if (this.i() != null) {
                      this.i().a(new ChatMessage("multiplayer.disconnect.generic", new Object[0]));