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-rw-r--r--crypto/src/x509/X509Utilities.cs1
1 files changed, 0 insertions, 1 deletions
diff --git a/crypto/src/x509/X509Utilities.cs b/crypto/src/x509/X509Utilities.cs
index ed4d34559..461a545f9 100644
--- a/crypto/src/x509/X509Utilities.cs
+++ b/crypto/src/x509/X509Utilities.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Collections;
-using System.IO;
 
 using Org.BouncyCastle.Asn1;
 using Org.BouncyCastle.Asn1.CryptoPro;