fix: 删除 RemoteConfigBase 内OnChange 回调的JSON 属性

Signed-off-by: huyufei <yufei.hu@castbox.fm>

Runtime/GuruRemote/Runtime/RemoteConfigBase.cs

@@ -1,6 +1,8 @@
 namespace Guru
 {
     using System;
+    using UnityEngine;
+    using Newtonsoft.Json;
     
     public abstract class RemoteConfigBase<T>: IRemoteConfig<T> where T : IRemoteConfig<T>
     {
@@ -8,6 +10,8 @@ namespace Guru
         /// 配置是否可用
         /// </summary>
         public bool enable { get; set; } = true;
+        
+        [JsonIgnore]
         public Action<T> OnValueChanged { get; set; }
         /// <summary>
         /// 转为Json