message: elle.Duration: get rid of _ms, etc.
diff: @@ -11,27 +11,3 @@ namespace elle
  return s << "no duration";
  }
  }
  -
  -boost::posix_time::millisec
  -operator "" _ms(unsigned long long time)
  -{
  - return boost::posix_time::millisec{static_cast<long>(time)};
  -}
  -
  -boost::posix_time::seconds
  -operator "" _sec(unsigned long long time)
  -{
  - return boost::posix_time::seconds{static_cast<long>(time)};
  -}
  -
  -boost::posix_time::minutes
  -operator "" _min(unsigned long long time)
  -{
  - return boost::posix_time::minutes{static_cast<long>(time)};
  -}
  -
  -boost::posix_time::hours
  -operator "" _h(unsigned long long time)
  -{
  - return boost::posix_time::hours{static_cast<long>(time)};
  -}
  