diff --git a/src/mscorlib/src/System/Threading/ThreadPool.cs b/src/mscorlib/src/System/Threading/ThreadPool.cs
index b1ffc778704c..f4c8abf2b067 100644
--- a/src/mscorlib/src/System/Threading/ThreadPool.cs
+++ b/src/mscorlib/src/System/Threading/ThreadPool.cs
@@ -57,11 +57,6 @@ internal static class ThreadPoolGlobals
 
         [SecurityCritical]
         public static ThreadPoolWorkQueue workQueue = new ThreadPoolWorkQueue();
-
-        [System.Security.SecuritySafeCritical] // static constructors should be safe to call
-        static ThreadPoolGlobals()
-        {
-        }
     }
 
     internal sealed class ThreadPoolWorkQueue
@@ -1168,9 +1163,6 @@ internal interface IThreadPoolWorkItem
 
     internal sealed class QueueUserWorkItemCallback : IThreadPoolWorkItem
     {
-        [System.Security.SecuritySafeCritical]
-        static QueueUserWorkItemCallback() {}
-
         private WaitCallback callback;
         private ExecutionContext context;
         private Object state;
@@ -1263,9 +1255,6 @@ static private void WaitCallback_Context(Object state)
 
     internal class _ThreadPoolWaitOrTimerCallback
     {
-        [System.Security.SecuritySafeCritical]
-        static _ThreadPoolWaitOrTimerCallback() {}
-
         WaitOrTimerCallback _waitOrTimerCallback;
         ExecutionContext _executionContext;
         Object _state;