install-iis: remove import of non-existing AbstractInstallCommand 'gearbox -h' would fail to import install--is and complain: Could not load EntryPoint.parse('install-iis = kallithea.lib.paster_commands.install_iis:Command') AbstractInstallCommand was a paster thing, not present in gearbox ... but also no longer used.

babel >= 0.9.6, < 2.4
waitress >= 0.8.8, < 1.0
pytest ~= 3.0
pytest-runner
pytest-sugar>=0.7.0
pytest-benchmark
pytest-catchlog
pytest-localserver
mock
sphinx
webtest < 3