Bugfix: no files downloaded when overwrite=False

[leeclemnet]

What does this PR do?

Currently RF100VlDataset.download() creates the target directory before calling latest_version.download(). The roboflow SDK's Version.download() with overwrite=False checks whether the destination directory already exists — if it does, it assumes the dataset was already downloaded and skips the actual download. Since Version.download() already handles directory creation, we can just remove it from RF100VlDataset.download() to fix the issue

Type of Change

• Bug fix (non-breaking change that fixes an issue)

Testing

• I have tested this change locally
• I have added/updated tests for this change

Test details:

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code where necessary, particularly in hard-to-understand areas
• My changes generate no new warnings or errors
• I have updated the documentation accordingly (if applicable)

Additional Context