Removing episodes from LeRobotDataset

[andlyu]

Hi, thanks for building this. It's great.

Is there a way to easily remove episodes from a dataset. I had a decent amount of diversity in my episodes, and wanted to reduce it, so I had to remove ~1/2 of the episodes. Rather than rerecording them, I wanted to remove specified episodes (lets say all even episodes). Is there an easy way to do this? I'de tried just removing them from the episodes.jsonl file, but it seemed to load all of the episodes, and also deleting unwated episode videos/data and renaming the files through some issues when loading the datasets. Is there a better way to do this?