Moves windows specific field to Debug.Windows.cs file (dotnet/corert#3733)

Signed-off-by: dotnet-bot <dotnet-bot@microsoft.com>

diff --git a/src/mscorlib/shared/System/Diagnostics/Debug.cs b/src/mscorlib/shared/System/Diagnostics/Debug.cs
index 59f3c378da211c1f6280d087825353f083c4a566..5178f7f5c5be374dc72e0aa2b60021097ec98021 100644 (file)
--- a/src/mscorlib/shared/System/Diagnostics/Debug.cs
+++ b/src/mscorlib/shared/System/Diagnostics/Debug.cs
@@ -73,8 +73,6 @@ namespace System.Diagnostics
             Write(string.Format(null, format, args));
         }
 
-        private static readonly object s_ForLock = new Object();
-
         [System.Diagnostics.Conditional("DEBUG")]
         public static void Assert(bool condition)
         {