## Changes
In https://github.com/databricks/cli/pull/1202 the semantics of
`cmdio.RenderJson` was changes to always render the JSON object. Before
we would only render it if `--output json` was specified.
This PR fixes the logs to print human-readable log lines instead of a
JSON object.
This PR also removes the now unused `cmdio.Render` method.
## Tests
Manually:
```
➜ bundle-playground git:(master) ✗ cli workspace import-dir ./tmp /Users/shreyas.goenka@databricks.com/test-import-1 -p aws-prod-ucws
Importing files from ./tmp
a -> /Users/shreyas.goenka@databricks.com/test-import-1/a
Import complete. The files are available at /Users/shreyas.goenka@databricks.com/test-import-1
```
```
➜ bundle-playground git:(master) ✗ cli workspace export-dir /Users/shreyas.goenka@databricks.com/test-export-1 ./tmp-2 -p aws-prod-ucws
Exporting files from /Users/shreyas.goenka@databricks.com/test-export-1
/Users/shreyas.goenka@databricks.com/test-export-1/b -> tmp-2/b
Exported complete. The files are available at ./tmp-2
```