Remove "Implement-Chunk-Priority-Urgency-System-for-Chunks" (Fixes #5980)

Mojang made some changes to priorities in 1.17 and it seems that these changes
conflict with the changes made in this patch, which in some cases appears to
cause excessive rescheduling of tasks.

This, however, is not confirmed as such but seems to be the behavior that we're
seeing to cause this issue, if mojang has adopted the changes we suggested,
then a good chunk of this patch may be unneeded, but, this needs a much better
look than I'm currently able to do

patches/server/Improve-Chunk-Status-Transition-Speed.patch

@@ -49,6 +49,13 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        ChunkAccess chunk = getAvailableChunkNow();
 +        return chunk != null && (status == null || chunk.getStatus().isOrAfter(getNextStatus(status)));
 +    }
++    // Yanked from chunk priotisation patch - remove?
++    public static ChunkStatus getNextStatus(ChunkStatus status) {
++        if (status == ChunkStatus.FULL) {
++            return status;
++        }
++        return CHUNK_STATUSES.get(status.getIndex() + 1);
++    }
 +    // Paper end
  
      public ChunkHolder(ChunkPos pos, int level, LevelHeightAccessor world, LevelLightEngine lightingProvider, ChunkHolder.LevelChangeListener levelUpdateListener, ChunkHolder.PlayerProvider playersWatchingChunkProvider) {