### Description * Add `delete_file` method to WasbHook * Add WasbDeleteBlobOperator
*Additional changes* The `click` dependency was recently updated to `7.0`, which breaks the build. I have pinpointed it to `6.7` in order to (temporarily) fix this. ### Tests * Add 4 tests to tests/contrib/hooks/test_wasb_hook.py * Create new tests in tests/contrib/operators/test_wasb_delete_blob_operator.py ### Code Quality On my manually patched local installation, running ./scripts/ci/flake8-diff.sh exits without any problems. Currently, the Travis CI build will fail due to a new version of `pynacl` being released. This is addressed in the following PR by John: https://github.com/apache/incubator-airflow-ci/pull/3 [ Full content available at: https://github.com/apache/incubator-airflow/pull/3961 ] This message was relayed via gitbox.apache.org for [email protected]
