csv parser

**Is your feature request related to a problem? Please describe.**
I deleted an old file that has inside of our generator folder.
So its something crashing - blame me.

And I got some confusion because only USFA parsers are actually used that file
so I have a question about what and how it's going on at FoodComposition folder.

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**Additional context**
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Start by checking the generator folder and the FoodComposition folder to identify the deleted file and how the USFA parsers are referenced. Confirm what currently crashes and document the intended CSV-parser change before implementation; the issue does not define a test or a completion condition.

Written by the indexing model from the issue text.