Remove unused fields.

src/Renci.SshNet.Tests/Classes/Sftp/SftpFileStreamTest_Flush_WriteMode_NoDataInBuffer.cs

@@ -19,7 +19,6 @@ namespace Renci.SshNet.Tests.Classes.Sftp
         private uint _readBufferSize;
         private uint _writeBufferSize;
         private byte[] _writeBytes;
-        private byte[] _requestWriteBytes;
 
         protected override void SetupData()
         {

src/Renci.SshNet.Tests/Classes/Sftp/SftpFileStreamTest_Seek_PositionedAtBeginningOfStream_OriginBeginAndOffsetPositive.cs

@@ -19,7 +19,6 @@ namespace Renci.SshNet.Tests.Classes.Sftp
         private byte[] _handle;
         private SftpFileStream _target;
         private int _offset;
-        private EndOfStreamException _actualException;
         private long _actual;
 
         protected override void SetupData()