Remove unused using

Author: mnadareski

SabreTools.Serialization/Wrappers/InstallShieldCabinet.cs

@@ -1,7 +1,6 @@
 using System;
 using System.IO;
 using System.Text.RegularExpressions;
-using SabreTools.Hashing;
 using SabreTools.IO.Compression.zlib;
 using SabreTools.Models.InstallShieldCabinet;
 using static SabreTools.Models.InstallShieldCabinet.Constants;