Paper/patches/server/0594-Remove-stale-POIs.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Sat, 9 Jan 2021 14:17:07 +0100
Subject: [PATCH] Remove stale POIs


diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
index fda07a19e9e54adb88ccac2dd0b65d5a0aeeb18a..bbdabc00ea2ca0db7fd50ddb4ecd3e14661199f3 100644
--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
@@ -1770,6 +1770,11 @@ public class ServerLevel extends net.minecraft.world.level.Level implements Worl
             });
             optional1.ifPresent((villageplacetype) -> {
                 this.getServer().execute(() -> {
+                    // Paper start
+                    if (!optional.isPresent() && this.getPoiManager().exists(blockposition1, com.google.common.base.Predicates.alwaysTrue())) {
+                        this.getPoiManager().remove(blockposition1);
+                    }
+                    // Paper end
                     this.getPoiManager().add(blockposition1, villageplacetype);
                     DebugPackets.sendPoiAddedPacket(this, blockposition1);
                 });