Set DDTv2 as 64-bit and remove concept of multiple sizes of DDTs.

include/aaruformat/enums.h

@@ -220,15 +220,6 @@ typedef enum
     AudioMedia  = 3   ///< Media that can only store data when modulated to audio.
 } XmlMediaType;
 
-/**
- * \enum DdtSizeType
- * \brief Size type for Deduplication Data Table (DDT) entries.
- */
-typedef enum
-{
-    BigDdtSizeType = 1  ///< Large sized DDT entries.
-} DdtSizeType;
-
 /**
  * \enum SectorStatus
  * \brief Acquisition / content status for one or more sectors.