diff --git a/Runtime/ChromeDevtools/DevtoolsProtocolHandler.cs b/Runtime/ChromeDevtools/DevtoolsProtocolHandler.cs
index 3c912fdc21cb203f91115973b2ba5e613a554e59..aa2bcb434ccfd8eef1e6ac0d7462725826c0e30e 100644
--- a/Runtime/ChromeDevtools/DevtoolsProtocolHandler.cs
+++ b/Runtime/ChromeDevtools/DevtoolsProtocolHandler.cs
@@ -7,9 +7,7 @@ using Newtonsoft.Json.Linq;
 using System;
 using System.Collections;
 using System.Collections.Concurrent;
-using System.Collections.Generic;
 using System.Threading.Tasks;
-using UnityEditor.PackageManager;
 using UnityEngine;
 
 namespace bessw.Unity.WebView.ChromeDevTools