contrib: drop python2.7 from the Windows dependency install script...
contrib: drop python2.7 from the Windows dependency install script
While we aren't quite ready to drop py27 yet, the MS compiler is no longer
available from MS (there is a copy on github if it's really needed), and that
causes the script to fail.
Differential Revision:
https://phab.mercurial-scm.org/D11273
