statichttprepo: move HTTPRangeHandler from byterange and delete the latter It turns out we've been toting around 472 lines of Python just for this 20-ish line class that teaches urllib how to handle '206 Partial Content'. byterange.py showed up in my \sstr\( Python 3 dragnet, and found itself having overstayed its welcome in our codebase. # no-check-commit because we're moving code that has to have foo_bar naming. Differential Revision: https://phab.mercurial-scm.org/D2443