Move dupe type enum to better namespace

SabreTools.Core/Enums.cs

@@ -700,21 +700,6 @@ namespace SabreTools.Core
         Unknown = 1 << 4,
     }
 
-    /// <summary>
-    /// Determines which type of duplicate a file is
-    /// </summary>
-    [Flags]
-    public enum DupeType
-    {
-        // Type of match
-        Hash = 1 << 0,
-        All = 1 << 1,
-
-        // Location of match
-        Internal = 1 << 2,
-        External = 1 << 3,
-    }
-
     /// <summary>
     /// Determine the endianness
     /// </summary>