add back Optimize collision to not load chunks

patches/server/0432-Maps-shouldn-t-load-chunks.patch

@@ -1,32 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Phoenix616 <mail@moep.tv>
-Date: Sun, 7 Jun 2020 21:43:42 +0100
-Subject: [PATCH] Maps shouldn't load chunks
-
-Previously maps would load all chunks in a certain radius depending on
- their scale when trying to update their content. This would result in
- main thread chunk loads when they weren't really necessary, especially
- on low view distances or "slow" async chunk loads after teleports or
- other prioritisation.
-
- This changes it to only try to render already loaded chunks based on
- the assumption that the chunks around the player will get loaded
- eventually anyways and that maps will get checked for update every
- five ticks that movement occur in anyways.
-
-diff --git a/src/main/java/net/minecraft/world/item/MapItem.java b/src/main/java/net/minecraft/world/item/MapItem.java
-index 65fbc22b3b03d1e95cf76da37babd052d8ae4445..27862f85307e2de5f3fe2195b62a1a9bd3f496de 100644
---- a/src/main/java/net/minecraft/world/item/MapItem.java
-+++ b/src/main/java/net/minecraft/world/item/MapItem.java
-@@ -131,9 +131,9 @@ public class MapItem extends ComplexItem {
-                             int k2 = (j / i + k1 - 64) * i;
-                             int l2 = (k / i + l1 - 64) * i;
-                             Multiset<MaterialColor> multiset = LinkedHashMultiset.create();
--                            LevelChunk chunk = world.getChunkAt(new BlockPos(k2, 0, l2));
-+                            LevelChunk chunk = world.getChunkIfLoaded(new BlockPos(k2, 0, l2)); // Paper - Maps shouldn't load chunks
- 
--                            if (!chunk.isEmpty()) {
-+                            if (chunk != null && !chunk.isEmpty()) { // Paper - Maps shouldn't load chunks
-                                 ChunkPos chunkcoordintpair = chunk.getPos();
-                                 int i3 = k2 & 15;
-                                 int j3 = l2 & 15;