Clean up data directory in Visual Sandbox

In this part of the S3 bucket -- https://s3.console.aws.amazon.com/s3/buckets/visual-sandbox?prefix=orca-eye-aye/data/&region=us-west-2&bucketType=general

```[tasklist]
### Tasks
- [ ] Remove 3 jpg files?
- [ ] Clean up and then document remaining folders (either in local README, or better yet in data access section of main repo README)
```
