Clear unused properties left in the materials after changing shaders

ClearShaderProperties.cs

using System.Text;
using UnityEngine;
using UnityEditor;

namespace Friday.Utilities
{
    public class ClearShaderProperties : EditorWindow
    {
        private Material m_selectedMaterial;
        private SerializedObject m_serializedObject;

        [MenuItem("Friday/Material Cleanup")]
        private static void MaterialCleanup()
        {
            var materials = AssetDatabase.FindAssets("t:material");
            foreach (var guid in materials)
            {
                Cleanup(guid);
            }
        }

        private static void Cleanup(string guid)
        {
            Material mat = AssetDatabase.LoadAssetAtPath<Material>(AssetDatabase.GUIDToAssetPath(guid));
            SerializedObject so = new SerializedObject(mat);

            var props = new[] {"m_Floats", "m_Colors", "m_TexEnvs"};
            var m = "m_SavedProperties.";

            bool hasChanged = false;
            StringBuilder sb = new StringBuilder();
            foreach (string prop in props)
            {
                SerializedProperty sp = so.FindProperty($"m_SavedProperties.{prop}");
                if (sp != null && sp.isArray)
                {
                    for (int i = sp.arraySize - 1; i >= 0; --i)
                    {
                        string propName = sp.GetArrayElementAtIndex(i).displayName;
                        if (!mat.HasProperty(propName))
                        {
                            sp.DeleteArrayElementAtIndex(i);
                            sb.Append($"\t{sp.name} / {propName}\n");
                            hasChanged = true;
                        }
                    }
                }
            }

            if (hasChanged)
            {
                so.ApplyModifiedProperties();
                Debug.Log($"Updating {mat.name}\n\nDeleted property list:\n{sb}");
            }
        }
    }
}