Allow double removal from player chunk loader

Unlike Folia, players may be incorrectly be double-removed

Fixes https://github.com/PaperMC/Paper/issues/9299

patches/server/Rewrite-chunk-system.patch

@@ -2471,7 +2471,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        final PlayerChunkLoaderData loader = player.chunkLoader;
 +
 +        if (loader == null) {
-+            throw new IllegalStateException("Player is already removed from player chunk loader");
++            return;
 +        }
 +
 +        loader.remove();