Remove ThreadedWorldUpgrader patch

The patch does not implement Vanilla forceUpgrade behavior.
Specifically, poi/entity conversion and regionfile recreation.

The Vanilla force upgrader is also no longer broken by CB, so the
bug fixes from this patch are not relevant anymore.

patches/server/1029-Fix-shield-disable-inconsistency.patch

@@ -0,0 +1,22 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Jake Potrebic <jake.m.potrebic@gmail.com>
+Date: Fri, 26 Apr 2024 19:08:37 -0700
+Subject: [PATCH] Fix shield disable inconsistency
+
+In vanilla, if the damage source is tagged as a projectile,
+it will not disable the shield if the attacker is holding
+an axe item.
+
+diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
+index d6a7642697c08bcdc69b4f1d4475f0532e131b80..a1a72712e9acd4023c4b6832e5ec09dcc3676b6e 100644
+--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
++++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
+@@ -2341,7 +2341,7 @@ public abstract class LivingEntity extends Entity implements Attackable {
+                 this.hurtCurrentlyUsedShield((float) -event.getDamage(DamageModifier.BLOCKING));
+                 Entity entity = damagesource.getDirectEntity();
+ 
+-                if (entity instanceof LivingEntity && entity.distanceToSqr(this) <= (200.0D * 200.0D)) { // Paper - Improve boat collision performance
++                if (!damagesource.is(DamageTypeTags.IS_PROJECTILE) && entity instanceof LivingEntity && entity.distanceToSqr(this) <= (200.0D * 200.0D)) { // Paper - Improve boat collision performance
+                     this.blockUsingShield((LivingEntity) entity);
+                 }
+             }