Readd 0414 use distance map to optimise entity tracker (#9868)

patches/server/Optimise-chunk-tick-iteration.patch

@@ -112,9 +112,9 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 --- a/src/main/java/net/minecraft/server/level/ChunkMap.java
 +++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
 @@ -0,0 +0,0 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
-         // Note: players need to be explicitly added to distance maps before they can be updated
-         this.nearbyPlayers.removePlayer(player);
-         this.level.playerChunkLoader.removePlayer(player); // Paper - replace chunk loader
+             this.playerEntityTrackerTrackMaps[i].remove(player);
+         }
+         // Paper end - use distance map to optimise tracker
 +        this.playerMobSpawnMap.remove(player); // Paper - optimise chunk tick iteration
      }