CI: Removing linting from windows
CI: Removing linting from windows

This is a workaround for the somewhat mysterious `flake8` failures on
Windows so that we can get green builds.
Author: Phillip Cloud <cpcloud@gmail.com>

Closes #1896 from cpcloud/fix-lint-windows and squashes the following commits:

7f3a16c [Phillip Cloud] CI: Removing linting from windows
ibis-project/ibis,ibis-project/ibis,cpcloud/ibis,cloudera/ibis,cloudera/ibis,cpcloud/ibis,ibis-project/ibis,cpcloud/ibis,cpcloud/ibis,ibis-project/ibis,cloudera/ibis