diff --git a/src/System.Private.CoreLib/src/System/Threading/Timer.CoreCLR.cs b/src/System.Private.CoreLib/src/System/Threading/Timer.CoreCLR.cs
index 83b13b408d5c..fa4dae5c5d2d 100644
--- a/src/System.Private.CoreLib/src/System/Threading/Timer.CoreCLR.cs
+++ b/src/System.Private.CoreLib/src/System/Threading/Timer.CoreCLR.cs
@@ -59,15 +59,8 @@ protected override bool ReleaseHandle()
             }
         }
 
-        private readonly int _id; // TimerQueues[_id] == this
-
         private AppDomainTimerSafeHandle m_appDomainTimer;
 
-        private TimerQueue(int id)
-        {
-            _id = id;
-        }
-
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         private bool SetTimer(uint actualDuration)
         {