add back Optimize collision to not load chunks

patches/server/0437-Fix-sand-duping.patch

@@ -1,37 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Spottedleaf <Spottedleaf@users.noreply.github.com>
-Date: Fri, 12 Jun 2020 13:33:19 -0700
-Subject: [PATCH] Fix sand duping
-
-If the falling block dies during teleportation (entity#move), then we need
-to detect that by placing a check after the move.
-
-diff --git a/src/main/java/net/minecraft/world/entity/item/FallingBlockEntity.java b/src/main/java/net/minecraft/world/entity/item/FallingBlockEntity.java
-index a8a9cbcece45c3480120cb2fa0fa03523a87d317..e74a87336b47611fa29df4cd3d272fb08b91630b 100644
---- a/src/main/java/net/minecraft/world/entity/item/FallingBlockEntity.java
-+++ b/src/main/java/net/minecraft/world/entity/item/FallingBlockEntity.java
-@@ -110,6 +110,11 @@ public class FallingBlockEntity extends Entity {
- 
-     @Override
-     public void tick() {
-+        // Paper start - fix sand duping
-+        if (this.isRemoved()) {
-+            return;
-+        }
-+        // Paper end - fix sand duping
-         if (this.blockState.isAir()) {
-             this.discard();
-         } else if (this.level.isClientSide && this.removeAtMillis > 0L) {
-@@ -137,6 +142,12 @@ public class FallingBlockEntity extends Entity {
- 
-             this.move(MoverType.SELF, this.getDeltaMovement());
- 
-+            // Paper start - fix sand duping
-+            if (this.isRemoved()) {
-+                return;
-+            }
-+            // Paper end - fix sand duping
-+
-             // Paper start - Configurable EntityFallingBlock height nerf
-             if (this.level.paperConfig.fallingBlockHeightNerf != 0 && this.getY() > this.level.paperConfig.fallingBlockHeightNerf) {
-                 if (this.dropItem && this.level.getGameRules().getBoolean(GameRules.RULE_DOENTITYDROPS)) {