Remove unused import.

src/Renci.SshNet/Messages/Authentication/BannerMessage.cs

@@ -1,6 +1,4 @@
-using System;
-
-namespace Renci.SshNet.Messages.Authentication
+namespace Renci.SshNet.Messages.Authentication
 {
     /// <summary>
     /// Represents SSH_MSG_USERAUTH_BANNER message.

src/Renci.SshNet/Messages/Authentication/RequestMessageHost.cs

@@ -1,6 +1,4 @@
-using Renci.SshNet.Common;
-
-namespace Renci.SshNet.Messages.Authentication
+namespace Renci.SshNet.Messages.Authentication
 {
     /// <summary>
     /// Represents "hostbased" SSH_MSG_USERAUTH_REQUEST message.

src/Renci.SshNet/Messages/Authentication/RequestMessagePublicKey.cs

@@ -1,6 +1,4 @@
-using Renci.SshNet.Common;
-
-namespace Renci.SshNet.Messages.Authentication
+namespace Renci.SshNet.Messages.Authentication
 {
     /// <summary>
     /// Represents "publickey" SSH_MSG_USERAUTH_REQUEST message.
@@ -67,7 +65,7 @@ namespace Renci.SshNet.Messages.Authentication
         public RequestMessagePublicKey(ServiceName serviceName, string username, string keyAlgorithmName, byte[] keyData)
             : base(serviceName, username, "publickey")
         {
-            PublicKeyAlgorithmName = SshData.Ascii.GetBytes(keyAlgorithmName);
+            PublicKeyAlgorithmName = Ascii.GetBytes(keyAlgorithmName);
             PublicKeyData = keyData;
         }
 

src/Renci.SshNet/Messages/Connection/ChannelRequest/SubsystemRequestInfo.cs

@@ -1,6 +1,4 @@
-using Renci.SshNet.Common;
-
-namespace Renci.SshNet.Messages.Connection
+namespace Renci.SshNet.Messages.Connection
 {
     /// <summary>
     /// Represents "subsystem" type channel request information

src/Renci.SshNet/Messages/Transport/KeyExchangeDhGroupExchangeGroup.cs

@@ -1,5 +1,4 @@
-using System;
-using Renci.SshNet.Common;
+using Renci.SshNet.Common;
 
 namespace Renci.SshNet.Messages.Transport
 {

src/Renci.SshNet/Messages/Transport/KeyExchangeDhGroupExchangeReply.cs

@@ -1,5 +1,4 @@
-using System;
-using Renci.SshNet.Common;
+using Renci.SshNet.Common;
 
 namespace Renci.SshNet.Messages.Transport
 {

src/Renci.SshNet/Messages/Transport/KeyExchangeDhInitMessage.cs

@@ -1,5 +1,4 @@
-using System;
-using Renci.SshNet.Common;
+using Renci.SshNet.Common;
 
 namespace Renci.SshNet.Messages.Transport
 {

src/Renci.SshNet/Messages/Transport/KeyExchangeDhReplyMessage.cs

@@ -1,5 +1,4 @@
-using System;
-using Renci.SshNet.Common;
+using Renci.SshNet.Common;
 
 namespace Renci.SshNet.Messages.Transport
 {

src/Renci.SshNet/Messages/Transport/KeyExchangeEcdhInitMessage.cs

@@ -1,7 +1,5 @@
 using System;
 using Renci.SshNet.Common;
-using System.Linq;
-using System.Collections.Generic;
 
 namespace Renci.SshNet.Messages.Transport
 {