Remove chunk save reattempt patch

This patch does not appear to be doing anything useful, and may
hide errors.

Currently, the save logic does not run through this path either
so it did not do anything.

Additionally, properly implement support for handling
RegionFileSizeException in Moonrise.

patches/server/0384-Optimize-NetworkManager-Exception-Handling.patch

@@ -0,0 +1,23 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Andrew Steinborn <git@steinborn.me>
+Date: Sun, 5 Jul 2020 22:38:18 -0400
+Subject: [PATCH] Optimize NetworkManager Exception Handling
+
+
+diff --git a/src/main/java/net/minecraft/network/Varint21FrameDecoder.java b/src/main/java/net/minecraft/network/Varint21FrameDecoder.java
+index 421dd76816063d56ea80339b77531729edd6aa55..1523d69b7b332f0085f40310a94d406da6513edc 100644
+--- a/src/main/java/net/minecraft/network/Varint21FrameDecoder.java
++++ b/src/main/java/net/minecraft/network/Varint21FrameDecoder.java
+@@ -39,6 +39,12 @@ public class Varint21FrameDecoder extends ByteToMessageDecoder {
+     }
+ 
+     protected void decode(ChannelHandlerContext channelHandlerContext, ByteBuf byteBuf, List<Object> list) {
++        // Paper start - Perf: Optimize exception handling; if channel is not active just discard the packet
++        if (!channelHandlerContext.channel().isActive()) {
++            byteBuf.skipBytes(byteBuf.readableBytes());
++            return;
++        }
++        // Paper end - Perf: Optimize exception handling
+         byteBuf.markReaderIndex();
+         this.helperBuf.clear();
+         if (!copyVarint(byteBuf, this.helperBuf)) {