message: [Build] Remove unnecessary BOOST dependency
diff: @@ -5051,11 +5051,10 @@ void CWallet::ReconsiderZerocoins(std::list<CZerocoinMint>& listMintsRestored, s
  string CWallet::GetUniqueWalletBackupName(bool fzpivAuto) const
  {
  - posix_time::ptime timeLocal = posix_time::second_clock::local_time();
  stringstream ssDateTime;
  + std::string strWalletBackupName = strprintf("%s", DateTimeStrFormat(".%Y-%m-%d-%H-%M", GetTime()));
  + ssDateTime << strWalletBackupName;
  -
  - ssDateTime << gregorian::to_iso_extended_string(timeLocal.date()) << "-" << timeLocal.time_of_day();
  return strprintf("wallet%s.dat%s", fzpivAuto ? "-autozpivbackup" : "", DateTimeStrFormat(".%Y-%m-%d-%H-%M", GetTime()));
  }
  