Unity プロジェクトビューで選択中のGameObject以下の自前のComponentを全部消すやつ

ComponentRemover.cs

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

namespace ComponentRemover.Editor
{
    public class ComponentRemover : EditorWindow
    {
        static ComponentRemover window;

        [MenuItem("Window/ComponentRemover")]
        static void Open()
        {
            GetWindow<ComponentRemover>("ComponentRemover");
        }

        private void OnGUI()
        {
            if (GUILayout.Button("Remove all components"))
            {
                CheckGameObjects();
            }
        }

        private void CheckGameObjects()
        {
            var targets = Selection
                .gameObjects
                .SelectMany(x => GetChildren(x.transform))
                .Distinct();

            var sum = 0;
            foreach (var t in targets)
            {
                sum += DestroyComponents(t.gameObject);
            }

            Debug.Log("Removed:" + sum);
        }

        private int DestroyComponents(GameObject go)
        {
//            Debug.Log(go);

            var n = 0;

            var co = go.GetComponents<MonoBehaviour>();

            foreach (var monoBehaviour in co.Where(x =>
            {
                var ns = x.GetType().Namespace;
                return ns != null && !ns.StartsWith("UnityEngine");
            }))
            {
                DestroyImmediate(monoBehaviour);
                n++;
            }

            return n;
        }

        private static IEnumerable<Transform> GetChildren(Transform t)
        {
            var i = 0;
            yield return t;
            while (i < t.childCount)
            {
                yield return t.GetChild(i);
                ++i;
            }
        }
    }
}