CI: Fix flake8 errors (#2207)
CI: Fix flake8 errors (#2207)


ibis-project/ibis,cloudera/ibis,ibis-project/ibis,cloudera/ibis,cpcloud/ibis,cloudera/ibis,ibis-project/ibis,ibis-project/ibis,cpcloud/ibis,cpcloud/ibis,cpcloud/ibis