Remove `QueryClass.py` ?

What is [`QueryClass.py`](https://github.com/astropy/astroquery/blob/master/astroquery/QueryClass.py)?

It duplicates `TimeoutError` and `InvalidQueryError` in [`exceptions.py`](https://github.com/astropy/astroquery/blob/master/astroquery/exceptions.py) and doesn't appear in the [docs](http://astroquery.readthedocs.org/en/latest/search.html?q=queryclass&check_keywords=yes&area=default).

Can it be removed?