diff --git a/Editor/ModularAvatarSettings.cs b/Editor/ModularAvatarSettings.cs
deleted file mode 100644
index 36c6b778..00000000
--- a/Editor/ModularAvatarSettings.cs
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- * MIT License
- * 
- * Copyright (c) 2022 bd_
- * 
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- * 
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- * 
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-using UnityEditor;
-
-namespace nadena.dev.modular_avatar.core.editor
-{
-    internal static class ModularAvatarSettings
-    {
-        private const string PREFKEY_APPLY_ON_PLAY = "nadena.dev.modular-avatar.applyOnPlay";
-#if UNITY_EDITOR
-        public static bool applyOnPlay
-        {
-            get => EditorPrefs.GetBool(PREFKEY_APPLY_ON_PLAY, true);
-            set => EditorPrefs.SetBool(PREFKEY_APPLY_ON_PLAY, value);
-        }
-#else
-        public static bool applyOnPlay = false;
-#endif
-    }
-}
\ No newline at end of file
diff --git a/Editor/ModularAvatarSettings.cs.meta b/Editor/ModularAvatarSettings.cs.meta
deleted file mode 100644
index 14b5b04f..00000000
--- a/Editor/ModularAvatarSettings.cs.meta
+++ /dev/null
@@ -1,3 +0,0 @@
-fileFormatVersion: 2
-guid: bf636eb59d084fb3ae6ce8277adde230
-timeCreated: 1661822033
\ No newline at end of file