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-rw-r--r--src/mscorlib/src/System/Threading/CancellationTokenRegistration.cs1
1 files changed, 0 insertions, 1 deletions
diff --git a/src/mscorlib/src/System/Threading/CancellationTokenRegistration.cs b/src/mscorlib/src/System/Threading/CancellationTokenRegistration.cs
index ac27fe30e6..89e98fa3c8 100644
--- a/src/mscorlib/src/System/Threading/CancellationTokenRegistration.cs
+++ b/src/mscorlib/src/System/Threading/CancellationTokenRegistration.cs
@@ -6,7 +6,6 @@
////////////////////////////////////////////////////////////////////////////////
using System.Diagnostics.Contracts;
-using System.Security.Permissions;
using System.Runtime.CompilerServices;
namespace System.Threading