Remove entities from per-chunk list (Fixes #2918)

Spigot-Server-Patches/Add-some-Debug-to-Chunk-Entity-slices.patch

@@ -9,7 +9,7 @@ This should hopefully avoid duplicate entities ever being created
 if the entity was to end up in 2 different chunk slices
 
 diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
-index 28e5105ffe..2004f7fbe1 100644
+index 68cde3356..1d47e4737 100644
 --- a/src/main/java/net/minecraft/server/Chunk.java
 +++ b/src/main/java/net/minecraft/server/Chunk.java
 @@ -0,0 +0,0 @@ public class Chunk implements IChunkAccess {
@@ -47,7 +47,7 @@ index 28e5105ffe..2004f7fbe1 100644
      }
  
 @@ -0,0 +0,0 @@ public class Chunk implements IChunkAccess {
-         }
+ 
          // Paper start
          if (entity.currentChunk != null && entity.currentChunk.get() == this) entity.setCurrentChunk(null);
 +        if (entitySlices[i] == entity.entitySlice) {
@@ -57,7 +57,7 @@ index 28e5105ffe..2004f7fbe1 100644
              return;
          }
 diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
-index 8e23f336a8..e761f71487 100644
+index fcc47182c..09ec144eb 100644
 --- a/src/main/java/net/minecraft/server/Entity.java
 +++ b/src/main/java/net/minecraft/server/Entity.java
 @@ -0,0 +0,0 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke