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-rw-r--r--src/csharp/Grpc.Core/KeyCertificatePair.cs1
1 files changed, 0 insertions, 1 deletions
diff --git a/src/csharp/Grpc.Core/KeyCertificatePair.cs b/src/csharp/Grpc.Core/KeyCertificatePair.cs
index 7cea18618e..5def15a656 100644
--- a/src/csharp/Grpc.Core/KeyCertificatePair.cs
+++ b/src/csharp/Grpc.Core/KeyCertificatePair.cs
@@ -33,7 +33,6 @@
using System;
using System.Collections.Generic;
-using System.Collections.Immutable;
using Grpc.Core.Internal;
using Grpc.Core.Utils;