diff --git a/Assets/uDesktopMascot/Scripts/Utility/NotifyIconUtility.cs b/Assets/uDesktopMascot/Scripts/Utility/NotifyIconUtility.cs
index b8005ae0..326e6a6a 100644
--- a/Assets/uDesktopMascot/Scripts/Utility/NotifyIconUtility.cs
+++ b/Assets/uDesktopMascot/Scripts/Utility/NotifyIconUtility.cs
@@ -74,9 +74,6 @@ public enum NIM : uint
         [DllImport("shell32.dll", CharSet = CharSet.Unicode)]
         private static extern bool Shell_NotifyIcon(NIM dwMessage, ref NOTIFYICONDATA lpData);
 
-        [DllImport("user32.dll")]
-        private static extern IntPtr LoadIcon(IntPtr hInstance, IntPtr lpIconName);
-
         [DllImport("user32.dll")]
         private static extern bool DestroyIcon(IntPtr hIcon);
 
@@ -104,8 +101,6 @@ public enum NIM : uint
         private const int SW_HIDE = 0;
         private const int SW_SHOW = 5;
 
-        private static readonly IntPtr IDI_APPLICATION = (IntPtr)0x7F00; // デフォルトアイコン
-
         private static NOTIFYICONDATA notifyIconData;
         private static bool notifyIconAdded = false;