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
$ hg init
$ echo This is file a1 > a
$ hg add a
$ hg commit -m "commit #0"
$ ls
a
$ echo This is file b1 > b
$ hg add b
$ hg commit -m "commit #1"
$ hg co 0
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
B should disappear
$ ls
a