HoHCI-BikeSim/Assets/Scripts/DuplicateManager.cs

using System;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;

public class DuplicateManager : MonoBehaviour
{
    private void Start()
    {
        var objects = FindObjectsOfType<GameObject>();
        var objectsAtPos = new Dictionary<Vector3, List<GameObject>>();
        Debug.Log($"Found {objects.Length} GameObjects");
        var i = 0;
        foreach (var o in objects)
        {
            var pos = o.transform.position;
            if (!objectsAtPos.ContainsKey(pos))
            {
                var l = new List<GameObject> {o};
                objectsAtPos[pos] = l;
            }
            else
            {
                objectsAtPos[pos].Add(o);
            }

            i++;
            if (i % 100 == 0)
            {
                Debug.Log($"{i}/{objects.Length} objects done!");
            }
        }
        Debug.Log($"Done sorting");

        var objs = objectsAtPos.Values.Where(l => l.Count > 1);
        Debug.LogWarning($"{objs.Count()} gameobjects at exact same position");
        Debug.Log("Deleting objects..");

        foreach (var o in objs)
        {
            o.RemoveAt(0);
            foreach (var d in o)
            {
                Destroy(d);
            }
        }
    }
}