diff --git a/public/index.html b/public/index.html
index 07af050ea..37e4971ed 100644
--- a/public/index.html
+++ b/public/index.html
@@ -22,15 +22,6 @@
     <link rel="apple-touch-icon" sizes="72x72" href="img/apple-icon-72x72.png" />
     <link rel="apple-touch-icon" sizes="114x114" href="img/apple-icon-114x114.png" />
     <link rel="apple-touch-icon" sizes="144x144" href="img/apple-icon-144x144.png" />
-    <!-- three.js mapping for VRM extension -->
-    <script type="importmap">
-        {
-            "imports": {
-                "three": "./scripts/extensions/third-party/Extension-VRM/lib/three.module.js",
-                "three/addons/": "./scripts/extensions/third-party/Extension-VRM/lib/jsm/",
-                "@pixiv/three-vrm": "./scripts/extensions/third-party/Extension-VRM/lib/three-vrm.module.js"
-            }
-        }
     </script>
     <script src="lib/object-hasown.js"></script>
     <script src="lib/jquery-3.5.1.min.js"></script>