message: Remove unused ReadVersion and WriteVersion
  CDataStream and CAutoFile had a ReadVersion and WriteVersion method
  that was never used. Remove them.
diff: @@ -217,8 +217,6 @@ public:
  int GetType() { return nType; }
  void SetVersion(int n) { nVersion = n; }
  int GetVersion() { return nVersion; }
  - void ReadVersion() { *this >> nVersion; }
  - void WriteVersion() { *this << nVersion; }
  CDataStream& read(char* pch, size_t nSize)
  {
  @@ -395,8 +393,6 @@ public:
  int GetType() { return nType; }
  void SetVersion(int n) { nVersion = n; }
  int GetVersion() { return nVersion; }
  - void ReadVersion() { *this >> nVersion; }
  - void WriteVersion() { *this << nVersion; }
  CAutoFile& read(char* pch, size_t nSize)
  {
  