message: Drop unused CDBWrapper methods
diff: @@ -292,18 +292,6 @@ public:
  // Get an estimate of LevelDB memory usage (in bytes).
  size_t DynamicMemoryUsage() const;
  - // not available for LevelDB; provide for compatibility with BDB
  - bool Flush()
  - {
  - return true;
  - }
  -
  - bool Sync()
  - {
  - CDBBatch batch(*this);
  - return WriteBatch(batch, true);
  - }
  -
  CDBIterator *NewIterator()
  {
  return new CDBIterator(*this, pdb->NewIterator(iteroptions));
  